From b350a971a431d35726ae2c95db674b6e256d28df Mon Sep 17 00:00:00 2001
From: Oliver <oliver.henry.walters@gmail.com>
Date: Thu, 24 Jun 2021 13:12:46 +1000
Subject: [PATCH] Working on custom field info in metadata class

---
 InvenTree/InvenTree/metadata.py | 70 +++++++++++++++++++++++++++++++++
 InvenTree/templates/js/forms.js | 11 ++++++
 2 files changed, 81 insertions(+)

diff --git a/InvenTree/InvenTree/metadata.py b/InvenTree/InvenTree/metadata.py
index ac06f79d3e..412b001cdd 100644
--- a/InvenTree/InvenTree/metadata.py
+++ b/InvenTree/InvenTree/metadata.py
@@ -2,6 +2,18 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
+from django.db import models
+
+from collections import OrderedDict
+
+from django.core.exceptions import PermissionDenied
+from django.http import Http404
+from django.utils.encoding import force_str
+
+from rest_framework import exceptions, serializers, fields
+from rest_framework.request import clone_request
+from rest_framework.utils.field_mapping import ClassLookupDict
+
 from rest_framework.metadata import SimpleMetadata
 
 import users.models
@@ -17,6 +29,9 @@ class InvenTreeMetadata(SimpleMetadata):
     Thus when a client send an OPTIONS request to an API endpoint,
     it will only receive a list of actions which it is allowed to perform!
 
+    Additionally, we include some extra information about database models,
+    so we can perform lookup for ForeignKey related fields.
+
     """
 
     def determine_metadata(self, request, view):
@@ -73,3 +88,58 @@ class InvenTreeMetadata(SimpleMetadata):
             pass
 
         return metadata
+
+    def get_field_info(self, field):
+        """
+        Given an instance of a serializer field, return a dictionary
+        of metadata about it.
+        """
+
+        field_info = OrderedDict()
+
+        field_info['type'] = self.label_lookup[field]
+        field_info['required'] = getattr(field, 'required', False)
+
+        if field_info['type'] == 'field':
+
+            # If the field is a 'ForeignKey' field
+            if isinstance(field, serializers.ModelSerializer): # or isinstance(field, serializers.PrimaryKeyRelatedField):
+                model = field.Meta.model
+
+                # Construct the 'table name' from the model
+                app_label = model._meta.app_label
+                tbl_label = model._meta.model_name
+
+                table = f"{app_label}_{tbl_label}"
+                field_info['model'] = table
+
+            print(field_info['type'], field, type(field))
+
+        attrs = [
+            'read_only', 'label', 'help_text',
+            'min_length', 'max_length',
+            'min_value', 'max_value'
+        ]
+
+        for attr in attrs:
+            value = getattr(field, attr, None)
+            if value is not None and value != '':
+                field_info[attr] = force_str(value, strings_only=True)
+
+        if getattr(field, 'child', None):
+            field_info['child'] = self.get_field_info(field.child)
+        elif getattr(field, 'fields', None):
+            field_info['children'] = self.get_serializer_info(field)
+
+        if (not field_info.get('read_only') and
+            not isinstance(field, (serializers.RelatedField, serializers.ManyRelatedField)) and
+                hasattr(field, 'choices')):
+            field_info['choices'] = [
+                {
+                    'value': choice_value,
+                    'display_name': force_str(choice_name, strings_only=True)
+                }
+                for choice_value, choice_name in field.choices.items()
+            ]
+
+        return field_info
\ No newline at end of file
diff --git a/InvenTree/templates/js/forms.js b/InvenTree/templates/js/forms.js
index 47e3337a20..ffc7dc8de8 100644
--- a/InvenTree/templates/js/forms.js
+++ b/InvenTree/templates/js/forms.js
@@ -1,3 +1,6 @@
+{% load i18n %}
+{% load inventree_extras %}
+
 /**
  * This file contains code for rendering (and managing) HTML forms
  * which are served via the django-drf API.
@@ -229,16 +232,24 @@ function constructFormBody(url, fields, options={}) {
         html += f;
     }
 
+    // TODO: Dynamically create the modals,
+    //       so that we can have an infinite number of stacks!
     var modal = '#modal-form';
 
     modalEnable(modal, true);
 
+    var title = options.title || '{% trans "Form Title" %}';
+
+    modalSetTitle(modal, title);
+
     $(modal).find('.modal-form-content').html(html);
 
     $(modal).modal('show');
 
     attachToggle(modal);
     attachSelect(modal);
+
+    modalShowSubmitButton(modal, true);
 }