Merge branch 'inventree:master' into price-history

.github/workflows/coverage.yaml

@@ -2,7 +2,14 @@
 
 name: SQLite
 
-on: ["push", "pull_request"]
+on:
+  push:
+    branches-ignore:
+      - l10*
+
+  pull_request:
+    branches-ignore:
+      - l10*
 
 jobs:
 

.github/workflows/mysql.yaml

@@ -2,7 +2,14 @@
 
 name: MySQL
 
-on: ["push", "pull_request"]
+on:
+  push:
+    branches-ignore:
+      - l10*
+
+  pull_request:
+    branches-ignore:
+      - l10*
 
 jobs:
 

.github/workflows/postgresql.yaml

@@ -2,7 +2,14 @@
 
 name: PostgreSQL
 
-on: ["push", "pull_request"]
+on:
+  push:
+    branches-ignore:
+      - l10*
+
+  pull_request:
+    branches-ignore:
+      - l10*
 
 jobs:
 

.github/workflows/style.yaml

@@ -1,6 +1,13 @@
 name: Style Checks
 
-on: ["push", "pull_request"]
+on:
+  push:
+    branches-ignore:
+      - l10*
+
+  pull_request:
+    branches-ignore:
+      - l10*
 
 jobs:
   style:

.github/workflows/translations.yml

@@ -5,7 +5,6 @@ on:
     branches:
       - master
 
-
 jobs:
   build:
 

InvenTree/InvenTree/apps.py

@@ -4,8 +4,9 @@ import logging
 
 from django.apps import AppConfig
 from django.core.exceptions import AppRegistryNotReady
+from django.conf import settings
 
-from InvenTree.ready import canAppAccessDatabase
+from InvenTree.ready import isInTestMode, canAppAccessDatabase
 import InvenTree.tasks
 
 
@@ -20,6 +21,9 @@ class InvenTreeConfig(AppConfig):
         if canAppAccessDatabase():
             self.start_background_tasks()
 
+            if not isInTestMode():
+                self.update_exchange_rates()
+
     def start_background_tasks(self):
 
         try:
@@ -49,3 +53,53 @@ class InvenTreeConfig(AppConfig):
             'InvenTree.tasks.update_exchange_rates',
             schedule_type=Schedule.DAILY,
         )
+
+    def update_exchange_rates(self):
+        """
+        Update exchange rates each time the server is started, *if*:
+
+        a) Have not been updated recently (one day or less)
+        b) The base exchange rate has been altered
+        """
+
+        try:
+            from djmoney.contrib.exchange.models import ExchangeBackend
+            from datetime import datetime, timedelta
+            from InvenTree.tasks import update_exchange_rates
+        except AppRegistryNotReady:
+            pass
+
+        base_currency = settings.BASE_CURRENCY
+
+        update = False
+
+        try:
+            backend = ExchangeBackend.objects.get(name='InvenTreeExchange')
+
+            last_update = backend.last_update
+
+            if last_update is not None:
+                delta = datetime.now().date() - last_update.date()
+                if delta > timedelta(days=1):
+                    print(f"Last update was {last_update}")
+                    update = True
+            else:
+                # Never been updated
+                print("Exchange backend has never been updated")
+                update = True
+
+            # Backend currency has changed?
+            if not base_currency == backend.base_currency:
+                print(f"Base currency changed from {backend.base_currency} to {base_currency}")
+                update = True
+
+        except (ExchangeBackend.DoesNotExist):
+            print("Exchange backend not found - updating")
+            update = True
+
+        except:
+            # Some other error - potentially the tables are not ready yet
+            return
+
+        if update:
+            update_exchange_rates()

InvenTree/InvenTree/exchange.py

@@ -1,21 +1,29 @@
-from djmoney.contrib.exchange.backends.base import BaseExchangeBackend
+from django.conf import settings as inventree_settings
+
+from djmoney.contrib.exchange.backends.base import SimpleExchangeBackend
 
 
-class InvenTreeManualExchangeBackend(BaseExchangeBackend):
+class InvenTreeExchange(SimpleExchangeBackend):
     """
-    Backend for manually updating currency exchange rates
+    Backend for automatically updating currency exchange rates.
 
-    See the documentation for django-money: https://github.com/django-money/django-money
-
-    Specifically: https://github.com/django-money/django-money/tree/master/djmoney/contrib/exchange/backends
+    Uses the exchangerate.host service API
     """
 
-    name = "inventree"
-    url = None
+    name = "InvenTreeExchange"
 
-    def get_rates(self, **kwargs):
-        """
-        Do not get any rates...
-        """
+    def __init__(self):
+        self.url = "https://api.exchangerate.host/latest"
 
-        return {}
+        super().__init__()
+
+    def get_params(self):
+        # No API key is required
+        return {
+        }
+
+    def update_rates(self, base_currency=inventree_settings.BASE_CURRENCY):
+
+        symbols = ','.join(inventree_settings.CURRENCIES)
+
+        super().update_rates(base=base_currency, symbols=symbols)

InvenTree/InvenTree/forms.py

@@ -7,10 +7,12 @@ from __future__ import unicode_literals
 
 from django.utils.translation import ugettext_lazy as _
 from django import forms
+from django.contrib.auth.models import User
+
 from crispy_forms.helper import FormHelper
 from crispy_forms.layout import Layout, Field
 from crispy_forms.bootstrap import PrependedText, AppendedText, PrependedAppendedText, StrictButton, Div
-from django.contrib.auth.models import User
+
 from common.models import ColorTheme
 from part.models import PartCategory
 

InvenTree/InvenTree/helpers.py

@@ -8,7 +8,7 @@ import json
 import os.path
 from PIL import Image
 
-from decimal import Decimal
+from decimal import Decimal, InvalidOperation
 
 from wsgiref.util import FileWrapper
 from django.http import StreamingHttpResponse
@@ -606,3 +606,19 @@ def getNewestMigrationFile(app, exclude_extension=True):
         newest_file = newest_file.replace('.py', '')
 
     return newest_file
+
+
+def clean_decimal(number):
+    """ Clean-up decimal value """
+
+    # Check if empty
+    if number is None or number == '':
+        return Decimal(0)
+
+    # Check if decimal type
+    try:
+        clean_number = Decimal(number)
+    except InvalidOperation:
+        clean_number = number
+
+    return clean_number.quantize(Decimal(1)) if clean_number == clean_number.to_integral() else clean_number.normalize()

InvenTree/InvenTree/ready.py

@@ -1,6 +1,17 @@
 import sys
 
 
+def isInTestMode():
+    """
+    Returns True if the database is in testing mode
+    """
+
+    if 'test' in sys.argv:
+        return True
+
+    return False
+
+
 def canAppAccessDatabase():
     """
     Returns True if the apps.py file can access database records.

InvenTree/InvenTree/settings.py

@@ -19,6 +19,8 @@ import shutil
 import sys
 from datetime import datetime
 
+import moneyed
+
 import yaml
 from django.utils.translation import gettext_lazy as _
 
@@ -513,9 +515,19 @@ CURRENCIES = CONFIG.get(
     ],
 )
 
-BASE_CURRENCY = CONFIG.get('base_currency', 'USD')
+# Check that each provided currency is supported
+for currency in CURRENCIES:
+    if currency not in moneyed.CURRENCIES:
+        print(f"Currency code '{currency}' is not supported")
+        sys.exit(1)
 
-EXCHANGE_BACKEND = 'InvenTree.exchange.InvenTreeManualExchangeBackend'
+BASE_CURRENCY = get_setting(
+    'INVENTREE_BASE_CURRENCY',
+    CONFIG.get('base_currency', 'USD')
+)
+
+# Custom currency exchange backend
+EXCHANGE_BACKEND = 'InvenTree.exchange.InvenTreeExchange'
 
 # Extract email settings from the config file
 email_config = CONFIG.get('email', {})

InvenTree/InvenTree/tasks.py

@@ -163,30 +163,41 @@ def check_for_updates():
 
 def update_exchange_rates():
     """
-    If an API key for fixer.io has been provided, attempt to update currency exchange rates
+    Update currency exchange rates
     """
 
     try:
-        import common.models
+        from InvenTree.exchange import InvenTreeExchange
+        from djmoney.contrib.exchange.models import ExchangeBackend, Rate
         from django.conf import settings
-        from djmoney.contrib.exchange.backends import FixerBackend
     except AppRegistryNotReady:
         # Apps not yet loaded!
         return
-
-    fixer_api_key = common.models.InvenTreeSetting.get_setting('INVENTREE_FIXER_API_KEY', '').strip()
-
-    if not fixer_api_key:
-        # API key not provided
+    except:
+        # Other error?
         return
 
-    backend = FixerBackend(access_key=fixer_api_key)
+    # Test to see if the database is ready yet
+    try:
+        backend = ExchangeBackend.objects.get(name='InvenTreeExchange')
+    except ExchangeBackend.DoesNotExist:
+        pass
+    except:
+        # Some other error
+        print("Database not ready")
+        return
 
-    currencies = ','.join(settings.CURRENCIES)
+    backend = InvenTreeExchange()
+    print(f"Updating exchange rates from {backend.url}")
 
     base = settings.BASE_CURRENCY
 
-    backend.update_rates(base_currency=base, symbols=currencies)
+    print(f"Using base currency '{base}'")
+
+    backend.update_rates(base_currency=base)
+
+    # Remove any exchange rates which are not in the provided currencies
+    Rate.objects.filter(backend="InvenTreeExchange").exclude(currency__in=settings.CURRENCIES).delete()
 
 
 def send_email(subject, body, recipients, from_email=None):

InvenTree/InvenTree/tests.py

@@ -5,6 +5,12 @@ from django.test import TestCase
 import django.core.exceptions as django_exceptions
 from django.core.exceptions import ValidationError
 
+from django.conf import settings
+
+from djmoney.money import Money
+from djmoney.contrib.exchange.models import Rate, convert_money
+from djmoney.contrib.exchange.exceptions import MissingRate
+
 from .validators import validate_overage, validate_part_name
 from . import helpers
 from . import version
@@ -13,6 +19,8 @@ from mptt.exceptions import InvalidMove
 
 from decimal import Decimal
 
+import InvenTree.tasks
+
 from stock.models import StockLocation
 
 
@@ -308,3 +316,46 @@ class TestVersionNumber(TestCase):
         self.assertTrue(v_c > v_b)
         self.assertTrue(v_d > v_c)
         self.assertTrue(v_d > v_a)
+
+
+class CurrencyTests(TestCase):
+    """
+    Unit tests for currency / exchange rate functionality
+    """
+
+    def test_rates(self):
+
+        # Initially, there will not be any exchange rate information
+        rates = Rate.objects.all()
+
+        self.assertEqual(rates.count(), 0)
+
+        # Without rate information, we cannot convert anything...
+        with self.assertRaises(MissingRate):
+            convert_money(Money(100, 'USD'), 'AUD')
+
+        with self.assertRaises(MissingRate):
+            convert_money(Money(100, 'AUD'), 'USD')
+
+        currencies = settings.CURRENCIES
+
+        InvenTree.tasks.update_exchange_rates()
+
+        rates = Rate.objects.all()
+
+        self.assertEqual(rates.count(), len(currencies))
+
+        # Now that we have some exchange rate information, we can perform conversions
+
+        # Forwards
+        convert_money(Money(100, 'USD'), 'AUD')
+
+        # Backwards
+        convert_money(Money(100, 'AUD'), 'USD')
+
+        # Convert between non base currencies
+        convert_money(Money(100, 'CAD'), 'NZD')
+
+        # Convert to a symbol which is not covered
+        with self.assertRaises(MissingRate):
+            convert_money(Money(100, 'GBP'), 'ZWL')

InvenTree/InvenTree/urls.py

@@ -39,6 +39,7 @@ from rest_framework.documentation import include_docs_urls
 
 from .views import IndexView, SearchView, DatabaseStatsView
 from .views import SettingsView, EditUserView, SetPasswordView
+from .views import CurrencySettingsView, CurrencyRefreshView
 from .views import AppearanceSelectView, SettingCategorySelectView
 from .views import DynamicJsView
 
@@ -82,14 +83,16 @@ settings_urls = [
     url(r'^appearance/?', AppearanceSelectView.as_view(), name='settings-appearance'),
     url(r'^i18n/?', include('django.conf.urls.i18n')),
 
-    url(r'^global/?', SettingsView.as_view(template_name='InvenTree/settings/global.html'), name='settings-global'),
-    url(r'^report/?', SettingsView.as_view(template_name='InvenTree/settings/report.html'), name='settings-report'),
-    url(r'^category/?', SettingCategorySelectView.as_view(), name='settings-category'),
-    url(r'^part/?', SettingsView.as_view(template_name='InvenTree/settings/part.html'), name='settings-part'),
-    url(r'^stock/?', SettingsView.as_view(template_name='InvenTree/settings/stock.html'), name='settings-stock'),
-    url(r'^build/?', SettingsView.as_view(template_name='InvenTree/settings/build.html'), name='settings-build'),
-    url(r'^purchase-order/?', SettingsView.as_view(template_name='InvenTree/settings/po.html'), name='settings-po'),
-    url(r'^sales-order/?', SettingsView.as_view(template_name='InvenTree/settings/so.html'), name='settings-so'),
+    url(r'^global/', SettingsView.as_view(template_name='InvenTree/settings/global.html'), name='settings-global'),
+    url(r'^report/', SettingsView.as_view(template_name='InvenTree/settings/report.html'), name='settings-report'),
+    url(r'^category/', SettingCategorySelectView.as_view(), name='settings-category'),
+    url(r'^part/', SettingsView.as_view(template_name='InvenTree/settings/part.html'), name='settings-part'),
+    url(r'^stock/', SettingsView.as_view(template_name='InvenTree/settings/stock.html'), name='settings-stock'),
+    url(r'^build/', SettingsView.as_view(template_name='InvenTree/settings/build.html'), name='settings-build'),
+    url(r'^purchase-order/', SettingsView.as_view(template_name='InvenTree/settings/po.html'), name='settings-po'),
+    url(r'^sales-order/', SettingsView.as_view(template_name='InvenTree/settings/so.html'), name='settings-so'),
+    url(r'^currencies/', CurrencySettingsView.as_view(), name='settings-currencies'),
+    url(r'^currencies-refresh/', CurrencyRefreshView.as_view(), name='settings-currencies-refresh'),
 
     url(r'^(?P<pk>\d+)/edit/', SettingEdit.as_view(), name='setting-edit'),
 

InvenTree/InvenTree/views.py

@@ -12,18 +12,23 @@ from django.utils.translation import gettext_lazy as _
 from django.template.loader import render_to_string
 from django.http import JsonResponse, HttpResponseRedirect
 from django.urls import reverse_lazy
+from django.conf import settings
 
 from django.contrib.auth.mixins import PermissionRequiredMixin
 
 from django.views import View
 from django.views.generic import ListView, DetailView, CreateView, FormView, DeleteView, UpdateView
-from django.views.generic.base import TemplateView
+from django.views.generic.base import RedirectView, TemplateView
+
+from djmoney.contrib.exchange.models import ExchangeBackend, Rate
 
 from part.models import Part, PartCategory
 from stock.models import StockLocation, StockItem
 from common.models import InvenTreeSetting, ColorTheme
 from users.models import check_user_role, RuleSet
 
+import InvenTree.tasks
+
 from .forms import DeleteForm, EditUserForm, SetPasswordForm
 from .forms import ColorThemeSelectForm, SettingCategorySelectForm
 from .helpers import str2bool
@@ -769,6 +774,51 @@ class SettingsView(TemplateView):
         return ctx
 
 
+class CurrencyRefreshView(RedirectView):
+    """
+    POST endpoint to refresh / update exchange rates
+    """
+
+    url = reverse_lazy("settings-currencies")
+
+    def post(self, request, *args, **kwargs):
+        """
+        On a POST request we will attempt to refresh the exchange rates
+        """
+
+        # Will block for a little bit
+        InvenTree.tasks.update_exchange_rates()
+
+        return self.get(request, *args, **kwargs)
+
+
+class CurrencySettingsView(TemplateView):
+    """
+    View for configuring currency settings
+    """
+
+    template_name = "InvenTree/settings/currencies.html"
+
+    def get_context_data(self, **kwargs):
+
+        ctx = super().get_context_data(**kwargs).copy()
+
+        ctx['settings'] = InvenTreeSetting.objects.all().order_by('key')
+        ctx["base_currency"] = settings.BASE_CURRENCY
+        ctx["currencies"] = settings.CURRENCIES
+
+        ctx["rates"] = Rate.objects.filter(backend="InvenTreeExchange")
+
+        # When were the rates last updated?
+        try:
+            backend = ExchangeBackend.objects.get(name='InvenTreeExchange')
+            ctx["rates_updated"] = backend.last_update
+        except:
+            ctx["rates_updated"] = None
+
+        return ctx
+
+
 class AppearanceSelectView(FormView):
     """ View for selecting a color theme """
 

InvenTree/common/forms.py

@@ -5,14 +5,15 @@ Django forms for interacting with common objects
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
-from decimal import Decimal, InvalidOperation
-
 from django import forms
 from django.utils.translation import gettext as _
 
 from djmoney.forms.fields import MoneyField
 
 from InvenTree.forms import HelperForm
+from InvenTree.helpers import clean_decimal
+
+from common.settings import currency_code_default
 
 from .files import FileManager
 from .models import InvenTreeSetting
@@ -119,21 +120,6 @@ class MatchItem(forms.Form):
 
         super().__init__(*args, **kwargs)
 
-        def clean(number):
-            """ Clean-up decimal value """
-
-            # Check if empty
-            if not number:
-                return number
-
-            # Check if decimal type
-            try:
-                clean_number = Decimal(number)
-            except InvalidOperation:
-                clean_number = number
-
-            return clean_number.quantize(Decimal(1)) if clean_number == clean_number.to_integral() else clean_number.normalize()
-
         # Setup FileManager
         file_manager.setup()
 
@@ -160,7 +146,7 @@ class MatchItem(forms.Form):
                                     'type': 'number',
                                     'min': '0',
                                     'step': 'any',
-                                    'value': clean(row.get('quantity', '')),
+                                    'value': clean_decimal(row.get('quantity', '')),
                                 })
                             )
 
@@ -198,11 +184,11 @@ class MatchItem(forms.Form):
                         if 'price' in col_guess.lower():
                             self.fields[field_name] = MoneyField(
                                 label=_(col_guess),
-                                default_currency=InvenTreeSetting.get_setting('INVENTREE_DEFAULT_CURRENCY'),
+                                default_currency=currency_code_default(),
                                 decimal_places=5,
                                 max_digits=19,
                                 required=False,
-                                default_amount=clean(value),
+                                default_amount=clean_decimal(value),
                             )
                         else:
                             self.fields[field_name] = forms.CharField(

InvenTree/common/models.py

@@ -14,11 +14,12 @@ from django.db import models, transaction
 from django.db.utils import IntegrityError, OperationalError
 from django.conf import settings
 
-import djmoney.settings
 from djmoney.models.fields import MoneyField
 from djmoney.contrib.exchange.models import convert_money
 from djmoney.contrib.exchange.exceptions import MissingRate
 
+from common.settings import currency_code_default
+
 from django.utils.translation import ugettext_lazy as _
 from django.core.validators import MinValueValidator, URLValidator
 from django.core.exceptions import ValidationError
@@ -80,19 +81,6 @@ class InvenTreeSetting(models.Model):
             'default': '',
         },
 
-        'INVENTREE_DEFAULT_CURRENCY': {
-            'name': _('Default Currency'),
-            'description': _('Default currency'),
-            'default': 'USD',
-            'choices': djmoney.settings.CURRENCY_CHOICES,
-        },
-
-        'INVENTREE_FIXER_API_KEY': {
-            'name': _('fixer.io API key'),
-            'description': _('API key for fixer.io currency conversion service'),
-            'default': '',
-        },
-
         'INVENTREE_DOWNLOAD_FROM_URL': {
             'name': _('Download from URL'),
             'description': _('Allow download of remote images and files from external URL'),
@@ -765,7 +753,7 @@ def get_price(instance, quantity, moq=True, multiples=True, currency=None):
 
     if currency is None:
         # Default currency selection
-        currency = InvenTreeSetting.get_setting('INVENTREE_DEFAULT_CURRENCY')
+        currency = currency_code_default()
 
     pb_min = None
     for pb in instance.price_breaks.all():

InvenTree/common/settings.py

@@ -7,7 +7,8 @@ from __future__ import unicode_literals
 
 from moneyed import CURRENCIES
 
-from common.models import InvenTreeSetting
+import common.models
+from django.conf import settings
 
 
 def currency_code_default():
@@ -15,7 +16,7 @@ def currency_code_default():
     Returns the default currency code (or USD if not specified)
     """
 
-    code = InvenTreeSetting.get_setting('INVENTREE_DEFAULT_CURRENCY')
+    code = settings.BASE_CURRENCY
 
     if code not in CURRENCIES:
         code = 'USD'
@@ -28,4 +29,4 @@ def stock_expiry_enabled():
     Returns True if the stock expiry feature is enabled
     """
 
-    return InvenTreeSetting.get_setting('STOCK_ENABLE_EXPIRY')
+    return common.models.InvenTreeSetting.get_setting('STOCK_ENABLE_EXPIRY')

InvenTree/common/test_views.py

@@ -98,20 +98,15 @@ class SettingsViewTest(TestCase):
         Tests for a setting which has choices
         """
 
-        setting = InvenTreeSetting.get_setting_object('INVENTREE_DEFAULT_CURRENCY')
+        setting = InvenTreeSetting.get_setting_object('PURCHASEORDER_REFERENCE_PREFIX')
 
         # Default value!
-        self.assertEqual(setting.value, 'USD')
+        self.assertEqual(setting.value, 'PO')
 
         url = self.get_url(setting.pk)
 
         # Try posting an invalid currency option
-        data, errors = self.post(url, {'value': 'XPQaaa'}, valid=False)
-
-        self.assertIsNotNone(errors.get('value'), None)
-
-        # Try posting a valid currency option
-        data, errors = self.post(url, {'value': 'AUD'}, valid=True)
+        data, errors = self.post(url, {'value': 'Purchase Order'}, valid=True)
 
     def test_binary_values(self):
         """

InvenTree/company/tests.py

@@ -11,9 +11,6 @@ from .models import Company, Contact, ManufacturerPart, SupplierPart
 from .models import rename_company_image
 from part.models import Part
 
-from InvenTree.exchange import InvenTreeManualExchangeBackend
-from djmoney.contrib.exchange.models import Rate
-
 
 class CompanySimpleTest(TestCase):
 
@@ -41,14 +38,6 @@ class CompanySimpleTest(TestCase):
         self.zerglphs = SupplierPart.objects.get(SKU='ZERGLPHS')
         self.zergm312 = SupplierPart.objects.get(SKU='ZERGM312')
 
-        InvenTreeManualExchangeBackend().update_rates()
-
-        Rate.objects.create(
-            currency='AUD',
-            value='1.35',
-            backend_id='inventree',
-        )
-
     def test_company_model(self):
         c = Company.objects.get(name='ABC Co.')
         self.assertEqual(c.name, 'ABC Co.')

InvenTree/config_template.yaml

@@ -52,6 +52,9 @@ language: en-us
 # Use the environment variable INVENTREE_TIMEZONE
 timezone: UTC
 
+# Base currency code
+base_currency: USD
+
 # List of currencies supported by default.
 # Add other currencies here to allow use in InvenTree
 currencies:

InvenTree/part/api.py

@@ -7,7 +7,7 @@ from __future__ import unicode_literals
 
 from django_filters.rest_framework import DjangoFilterBackend
 from django.http import JsonResponse
-from django.db.models import Q, F, Count
+from django.db.models import Q, F, Count, Min, Max, Avg
 from django.utils.translation import ugettext_lazy as _
 
 from rest_framework import status
@@ -15,6 +15,10 @@ from rest_framework.response import Response
 from rest_framework import filters, serializers
 from rest_framework import generics
 
+from djmoney.money import Money
+from djmoney.contrib.exchange.models import convert_money
+from djmoney.contrib.exchange.exceptions import MissingRate
+
 from django.conf.urls import url, include
 from django.urls import reverse
 
@@ -24,6 +28,7 @@ from .models import PartAttachment, PartTestTemplate
 from .models import PartSellPriceBreak
 from .models import PartCategoryParameterTemplate
 
+from common.models import InvenTreeSetting
 from build.models import Build
 
 from . import serializers as part_serializers
@@ -877,6 +882,60 @@ class BomList(generics.ListCreateAPIView):
             else:
                 queryset = queryset.exclude(pk__in=pks)
 
+        # Annotate with purchase prices
+        queryset = queryset.annotate(
+            purchase_price_min=Min('sub_part__stock_items__purchase_price'),
+            purchase_price_max=Max('sub_part__stock_items__purchase_price'),
+            purchase_price_avg=Avg('sub_part__stock_items__purchase_price'),
+        )
+
+        # Get values for currencies
+        currencies = queryset.annotate(
+            purchase_price_currency=F('sub_part__stock_items__purchase_price_currency'),
+        ).values('pk', 'sub_part', 'purchase_price_currency')
+
+        def convert_price(price, currency, decimal_places=4):
+            """ Convert price field, returns Money field """
+
+            price_adjusted = None
+
+            # Get default currency from settings
+            default_currency = InvenTreeSetting.get_setting('INVENTREE_DEFAULT_CURRENCY')
+            
+            if price:
+                if currency and default_currency:
+                    try:
+                        # Get adjusted price
+                        price_adjusted = convert_money(Money(price, currency), default_currency)
+                    except MissingRate:
+                        # No conversion rate set
+                        price_adjusted = Money(price, currency)
+                else:
+                    # Currency exists
+                    if currency:
+                        price_adjusted = Money(price, currency)
+                    # Default currency exists
+                    if default_currency:
+                        price_adjusted = Money(price, default_currency)
+
+            if price_adjusted and decimal_places:
+                price_adjusted.decimal_places = decimal_places
+
+            return price_adjusted
+
+        # Convert prices to default currency (using backend conversion rates)
+        for bom_item in queryset:
+            # Find associated currency (select first found)
+            purchase_price_currency = None
+            for currency_item in currencies:
+                if currency_item['pk'] == bom_item.pk and currency_item['sub_part'] == bom_item.sub_part.pk:
+                    purchase_price_currency = currency_item['purchase_price_currency']
+                    break
+            # Convert prices
+            bom_item.purchase_price_min = convert_price(bom_item.purchase_price_min, purchase_price_currency)
+            bom_item.purchase_price_max = convert_price(bom_item.purchase_price_max, purchase_price_currency)
+            bom_item.purchase_price_avg = convert_price(bom_item.purchase_price_avg, purchase_price_currency)
+
         return queryset
 
     filter_backends = [

InvenTree/part/models.py

@@ -1861,6 +1861,59 @@ class Part(MPTTModel):
 
         return self.get_descendants(include_self=False)
 
+    @property
+    def can_convert(self):
+        """
+        Check if this Part can be "converted" to a different variant:
+
+        It can be converted if:
+
+        a) It has non-virtual variant parts underneath it
+        b) It has non-virtual template parts above it
+        c) It has non-virtual sibling variants
+
+        """
+
+        return self.get_conversion_options().count() > 0
+
+    def get_conversion_options(self):
+        """
+        Return options for converting this part to a "variant" within the same tree
+
+        a) Variants underneath this one
+        b) Immediate parent
+        c) Siblings
+        """
+
+        parts = []
+
+        # Child parts
+        children = self.get_descendants(include_self=False)
+
+        for child in children:
+            parts.append(child)
+
+        # Immediate parent
+        if self.variant_of:
+            parts.append(self.variant_of)
+
+        siblings = self.get_siblings(include_self=False)
+
+        for sib in siblings:
+            parts.append(sib)
+
+        filtered_parts = Part.objects.filter(pk__in=[part.pk for part in parts])
+
+        # Ensure this part is not in the queryset, somehow
+        filtered_parts = filtered_parts.exclude(pk=self.pk)
+
+        filtered_parts = filtered_parts.filter(
+            active=True,
+            virtual=False,
+        )
+
+        return filtered_parts
+
     def get_related_parts(self):
         """ Return list of tuples for all related parts:
             - first value is PartRelated object

InvenTree/part/serializers.py

@@ -12,6 +12,7 @@ from InvenTree.serializers import (InvenTreeAttachmentSerializerField,
 from InvenTree.status_codes import BuildStatus, PurchaseOrderStatus
 from rest_framework import serializers
 from sql_util.utils import SubqueryCount, SubquerySum
+from djmoney.contrib.django_rest_framework import MoneyField
 from stock.models import StockItem
 
 from .models import (BomItem, Part, PartAttachment, PartCategory,
@@ -367,6 +368,14 @@ class BomItemSerializer(InvenTreeModelSerializer):
 
     validated = serializers.BooleanField(read_only=True, source='is_line_valid')
 
+    purchase_price_min = MoneyField(max_digits=10, decimal_places=6, read_only=True)
+
+    purchase_price_max = MoneyField(max_digits=10, decimal_places=6, read_only=True)
+    
+    purchase_price_avg = serializers.SerializerMethodField()
+    
+    purchase_price_range = serializers.SerializerMethodField()
+
     def __init__(self, *args, **kwargs):
         # part_detail and sub_part_detail serializers are only included if requested.
         # This saves a bunch of database requests
@@ -394,6 +403,53 @@ class BomItemSerializer(InvenTreeModelSerializer):
         queryset = queryset.prefetch_related('sub_part__supplier_parts__pricebreaks')
         return queryset
 
+    def get_purchase_price_range(self, obj):
+        """ Return purchase price range """
+
+        try:
+            purchase_price_min = obj.purchase_price_min
+        except AttributeError:
+            return None
+
+        try:
+            purchase_price_max = obj.purchase_price_max
+        except AttributeError:
+            return None
+
+        if purchase_price_min and not purchase_price_max:
+            # Get price range
+            purchase_price_range = str(purchase_price_max)
+        elif not purchase_price_min and purchase_price_max:
+            # Get price range
+            purchase_price_range = str(purchase_price_max)
+        elif purchase_price_min and purchase_price_max:
+            # Get price range
+            if purchase_price_min >= purchase_price_max:
+                # If min > max: use min only
+                purchase_price_range = str(purchase_price_min)
+            else:
+                purchase_price_range = str(purchase_price_min) + " - " + str(purchase_price_max)
+        else:
+            purchase_price_range = '-'
+
+        return purchase_price_range
+
+    def get_purchase_price_avg(self, obj):
+        """ Return purchase price average """
+        
+        try:
+            purchase_price_avg = obj.purchase_price_avg
+        except AttributeError:
+            return None
+
+        if purchase_price_avg:
+            # Get string representation of price average
+            purchase_price_avg = str(purchase_price_avg)
+        else:
+            purchase_price_avg = '-'
+
+        return purchase_price_avg
+
     class Meta:
         model = BomItem
         fields = [
@@ -410,6 +466,10 @@ class BomItemSerializer(InvenTreeModelSerializer):
             'sub_part_detail',
             # 'price_range',
             'validated',
+            'purchase_price_min',
+            'purchase_price_max',
+            'purchase_price_avg',
+            'purchase_price_range',
         ]
 
 

InvenTree/part/templates/part/part_base.html

@@ -102,6 +102,11 @@
         </div>
 
         <div class='info-messages'>
+            {% if part.virtual %}
+            <div class='alert alert-warning alert-block'>
+                {% trans "This is a virtual part" %}
+            </div>
+            {% endif %}
             {% if part.variant_of %}
             <div class='alert alert-info alert-block'>
                 {% object_link 'part-variants' part.variant_of.id part.variant_of.full_name as link %}

InvenTree/part/views.py

@@ -2764,7 +2764,7 @@ class PartSalePriceBreakCreate(AjaxCreateView):
 
         initials['part'] = self.get_part()
 
-        default_currency = InvenTreeSetting.get_setting('INVENTREE_DEFAULT_CURRENCY')
+        default_currency = settings.BASE_CURRENCY
         currency = CURRENCIES.get(default_currency, None)
 
         if currency is not None:

InvenTree/stock/templates/stock/item_base.html

@@ -139,7 +139,7 @@
         <div class='btn-group'>
             <button id='stock-edit-actions' title='{% trans "Stock actions" %}' class='btn btn-default dropdown-toggle' type='button' data-toggle='dropdown'><span class='fas fa-tools'></span> <span class='caret'></span></button>
             <ul class='dropdown-menu' role='menu'>
-                {% if item.part.has_variants %}
+                {% if item.part.can_convert %}
                 <li><a href='#' id='stock-convert' title='{% trans "Convert to variant" %}'><span class='fas fa-screwdriver'></span> {% trans "Convert to variant" %}</a></li>
                 {% endif %}
                 {% if roles.stock.add %}
@@ -551,7 +551,7 @@ $("#stock-assign-to-customer").click(function() {
     );
 });
 
-{% if item.part.has_variants %}
+{% if item.part.can_convert %}
 $("#stock-convert").click(function() {
     launchModalForm("{% url 'stock-item-convert' item.id %}",
         {

InvenTree/stock/views.py

@@ -1373,7 +1373,7 @@ class StockItemConvert(AjaxUpdateView):
         form = super().get_form()
         item = self.get_object()
 
-        form.fields['part'].queryset = item.part.get_all_variants()
+        form.fields['part'].queryset = item.part.get_conversion_options()
 
         return form
 

InvenTree/templates/InvenTree/settings/currencies.html

@@ -0,0 +1,55 @@
+{% extends "InvenTree/settings/settings.html" %}
+{% load i18n %}
+{% load inventree_extras %}
+
+{% block tabs %}
+{% include "InvenTree/settings/tabs.html" with tab='currencies' %}
+{% endblock %}
+
+{% block subtitle %}
+{% trans "Currency Settings" %}
+{% endblock %}
+
+{% block settings %}
+
+<table class='table table-striped table-condensed'>
+    <tbody>
+        <tr>
+            <th>{% trans "Base Currency" %}</th>
+            <th>{{ base_currency }}</th>
+        </tr>
+        <tr>
+            <th colspan='2'>{% trans "Exchange Rates" %}</th>
+        </tr>
+        {% for rate in rates %}
+        <tr>
+            <td>{{ rate.currency }}</td>
+            <td>{{ rate.value }}</td>
+        </tr>
+        {% endfor %}
+        <tr>
+            <th>
+                {% trans "Last Update" %}
+            </th>
+            <td>
+                {% if rates_updated %}
+                {{ rates_updated }}
+                {% else %}
+                <i>{% trans "Never" %}</i>
+                {% endif %}
+                <form action='{% url "settings-currencies-refresh" %}' method='post'>
+                    <div id='refresh-rates-form'>
+                        {% csrf_token %}
+                        <button type='submit' id='update-rates' class='btn btn-default float-right'>{% trans "Update Now" %}</button>
+                    </div>
+                </form>
+            </td>
+        </tr>
+    </tbody>
+</table>
+
+{% endblock %}
+
+{% block js_ready %}
+{{ block.super }}
+{% endblock %}

InvenTree/templates/InvenTree/settings/global.html

@@ -19,8 +19,6 @@
         {% include "InvenTree/settings/setting.html" with key="INVENTREE_INSTANCE_TITLE" icon="fa-info-circle" %}
         {% include "InvenTree/settings/setting.html" with key="INVENTREE_BASE_URL" icon="fa-globe" %}
         {% include "InvenTree/settings/setting.html" with key="INVENTREE_COMPANY_NAME" icon="fa-building" %}
-        {% include "InvenTree/settings/setting.html" with key="INVENTREE_DEFAULT_CURRENCY" icon="fa-dollar-sign" %}
-        {% include "InvenTree/settings/setting.html" with key="INVENTREE_FIXER_API_KEY" icon="fa-key" %}
         {% include "InvenTree/settings/setting.html" with key="INVENTREE_DOWNLOAD_FROM_URL" icon="fa-cloud-download-alt" %}
     </tbody>
 </table>
@@ -33,4 +31,4 @@
     </tbody>
 </table>
 
-{% endblock %}
+{% endblock %}

InvenTree/templates/InvenTree/settings/tabs.html

@@ -15,6 +15,9 @@
     <li {% if tab == 'global' %} class='active' {% endif %}>
         <a href='{% url "settings-global" %}'><span class='fas fa-globe'></span> {% trans "Global" %}</a>
     </li>
+    <li {% if tab == 'currencies' %} class='active'{% endif %}>
+        <a href="{% url 'settings-currencies' %}"><span class='fas fa-dollar-sign'></span> {% trans "Currencies" %}</a>
+    </li>
     <li {% if tab == 'report' %} class='active' {% endif %}>
         <a href='{% url "settings-report" %}'><span class='fas fa-file-pdf'></span> {% trans "Report" %}</a>
     </li>

InvenTree/templates/js/bom.js

@@ -243,6 +243,22 @@ function loadBomTable(table, options) {
         }
     });
 
+    cols.push(
+    {
+        field: 'purchase_price_range',
+        title: '{% trans "Purchase Price Range" %}',
+        searchable: false,
+        sortable: true,
+    });
+
+    cols.push(
+    {
+        field: 'purchase_price_avg',
+        title: '{% trans "Purchase Price Average" %}',
+        searchable: false,
+        sortable: true,
+    });
+
     /*
 
     // TODO - Re-introduce the pricing column at a later stage,

docker/Dockerfile

@@ -41,9 +41,10 @@ LABEL org.label-schema.schema-version="1.0" \
 
 # Create user account
 RUN addgroup -S inventreegroup && adduser -S inventree -G inventreegroup
+
 WORKDIR ${INVENTREE_HOME}
 
-RUN mkdir ${INVENTREE_STATIC_ROOT}
+RUN mkdir -p ${INVENTREE_STATIC_ROOT}
 
 # Install required system packages
 RUN apk add --no-cache git make bash \

docker/start_dev_server.sh

@@ -3,12 +3,12 @@
 # Create required directory structure (if it does not already exist)
 if [[ ! -d "$INVENTREE_STATIC_ROOT" ]]; then
     echo "Creating directory $INVENTREE_STATIC_ROOT"
-    mkdir $INVENTREE_STATIC_ROOT
+    mkdir -p $INVENTREE_STATIC_ROOT
 fi
 
 if [[ ! -d "$INVENTREE_MEDIA_ROOT" ]]; then
     echo "Creating directory $INVENTREE_MEDIA_ROOT"
-    mkdir $INVENTREE_MEDIA_ROOT
+    mkdir -p $INVENTREE_MEDIA_ROOT
 fi
 
 # Check if "config.yaml" has been copied into the correct location

docker/start_prod_server.sh

@@ -3,12 +3,12 @@
 # Create required directory structure (if it does not already exist)
 if [[ ! -d "$INVENTREE_STATIC_ROOT" ]]; then
     echo "Creating directory $INVENTREE_STATIC_ROOT"
-    mkdir $INVENTREE_STATIC_ROOT
+    mkdir -p $INVENTREE_STATIC_ROOT
 fi
 
 if [[ ! -d "$INVENTREE_MEDIA_ROOT" ]]; then
     echo "Creating directory $INVENTREE_MEDIA_ROOT"
-    mkdir $INVENTREE_MEDIA_ROOT
+    mkdir -p $INVENTREE_MEDIA_ROOT
 fi
 
 # Check if "config.yaml" has been copied into the correct location

requirements.txt

@@ -25,6 +25,7 @@ django-stdimage==5.1.1          # Advanced ImageField management
 django-weasyprint==1.0.1        # HTML PDF export
 django-debug-toolbar==2.2       # Debug / profiling toolbar
 django-admin-shell==0.1.2       # Python shell for the admin interface
+py-moneyed==0.8.0               # Specific version requirement for py-moneyed
 django-money==1.1               # Django app for currency management
 certifi                         # Certifi is (most likely) installed through one of the requirements above
 django-error-report==0.2.0      # Error report viewer for the admin interface