From 90feb6d210632dc086fd226dc00e284173441934 Mon Sep 17 00:00:00 2001
From: Oliver Walters <oliver.henry.walters@gmail.com>
Date: Sun, 28 Feb 2021 20:31:01 +1100
Subject: [PATCH] Server-side paginatino for build orders

---
 InvenTree/build/api.py          |  3 +++
 InvenTree/part/test_api.py      | 13 +++++++++++++
 InvenTree/stock/test_api.py     | 13 +++++++++++++
 InvenTree/templates/js/build.js |  1 +
 4 files changed, 30 insertions(+)

diff --git a/InvenTree/build/api.py b/InvenTree/build/api.py
index cb6b3f6b2b..13c24c6110 100644
--- a/InvenTree/build/api.py
+++ b/InvenTree/build/api.py
@@ -8,6 +8,7 @@ from __future__ import unicode_literals
 from django_filters.rest_framework import DjangoFilterBackend
 from rest_framework import filters
 from rest_framework import generics
+from rest_framework.pagination import LimitOffsetPagination
 
 from django.conf.urls import url, include
 
@@ -28,6 +29,8 @@ class BuildList(generics.ListCreateAPIView):
     queryset = Build.objects.all()
     serializer_class = BuildSerializer
 
+    pagination_class = LimitOffsetPagination
+
     filter_backends = [
         DjangoFilterBackend,
         filters.SearchFilter,
diff --git a/InvenTree/part/test_api.py b/InvenTree/part/test_api.py
index d917b6ebb2..23865aa0f3 100644
--- a/InvenTree/part/test_api.py
+++ b/InvenTree/part/test_api.py
@@ -235,6 +235,19 @@ class PartAPITest(InvenTreeAPITestCase):
 
         self.assertEqual(response.status_code, status.HTTP_200_OK)
 
+    def test_paginate(self):
+        """
+        Test pagination of the Part list API
+        """
+
+        for n in [1, 5, 10]:
+            response = self.get(reverse('api-part-list'), {'limit': n})
+
+            self.assertIn('count', response)
+            self.assertIn('results', response)
+            
+            self.assertEqual(len(response['results']), n)
+
 
 class PartAPIAggregationTest(InvenTreeAPITestCase):
     """
diff --git a/InvenTree/stock/test_api.py b/InvenTree/stock/test_api.py
index 17cab7ffe3..ae0d6fd862 100644
--- a/InvenTree/stock/test_api.py
+++ b/InvenTree/stock/test_api.py
@@ -244,6 +244,19 @@ class StockItemListTest(StockAPITestCase):
         response = self.get_stock(expired=0)
         self.assertEqual(len(response), 16)
 
+    def test_paginate(self):
+        """
+        Test that we can paginate results correctly
+        """
+
+        for n in [1, 5, 10]:
+            response = self.get_stock(limit=n)
+
+            self.assertIn('count', response)
+            self.assertIn('results', response)
+
+            self.assertEqual(len(response['results']), n)
+
 
 class StockItemTest(StockAPITestCase):
     """
diff --git a/InvenTree/templates/js/build.js b/InvenTree/templates/js/build.js
index 01d5fcdef0..45ebd133d1 100644
--- a/InvenTree/templates/js/build.js
+++ b/InvenTree/templates/js/build.js
@@ -630,6 +630,7 @@ function loadBuildTable(table, options) {
         url: options.url,
         queryParams: filters,
         groupBy: false,
+        sidePagination: 'server',
         name: 'builds',
         original: params,
         columns: [