Add new externalities graph type

Author: nikolas

econplayground/main/migrations/0124_alter_graph_graph_type.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.1.6 on 2025-02-27 18:40
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('main', '0123_alter_graph_graph_type'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='graph',
+            name='graph_type',
+            field=models.PositiveSmallIntegerField(choices=[(0, 'Linear Demand and Supply'), (1, 'Input Markets'), (3, 'Cobb-Douglas Production Graph'), (5, 'Consumption-Leisure: Constraint'), (7, 'Consumption-Saving: Constraint'), (8, 'Linear Demand and Supply: 3 Functions'), (9, 'Linear Demand and Supply: Areas'), (10, 'Input Markets: Areas'), (11, 'Consumption-Saving: Optimal Choice'), (15, 'Consumption-Leisure: Optimal Choice'), (12, 'Input-Output Illustrations'), (13, 'Linear Demand and Supply: 2 Diagrams'), (14, 'Input Markets: 2 Diagrams'), (16, 'Template Graph'), (17, 'Optimal Choice: Consumption with 2 Goods'), (18, 'Cost Functions'), (20, 'Price Elasticity of Demand and Revenue'), (21, 'Optimal Choice: Cost-Minimizing Production Inputs'), (22, 'Tax Rate and Revenue'), (23, 'Taxation in Linear Demand and Supply'), (24, 'Tax Supply and Demand vs. Tax Revenue'), (25, 'Linear Demand and Supply - Surplus Policies'), (26, 'Externalities')], default=0),
+        ),
+    ]

econplayground/main/models.py

@@ -42,6 +42,7 @@
     (24, 'Tax Supply and Demand vs. Tax Revenue'),
 
     (25, 'Linear Demand and Supply - Surplus Policies'),
+    (26, 'Externalities'),
 )
 
 ASSIGNMENT_TYPES = (

media/js/src/utils.js

@@ -414,6 +414,9 @@ const displayGraphType = function(gType) {
         case 25:
             name = 'Linear Demand and Supply - Surplus Policies';
             break;
+        case 26:
+            name = 'Externalities';
+            break;
         default:
             break;
     }