from __future__ import unicode_literals

from django.db import models, migrations

def change_to_usage(apps, schema_editor):
    Recipe = apps.get_model("recipes", "Recipe")
    Ingredient = apps.get_model("recipes", "Ingredient")
    IngredientUsage = apps.get_model("recipes", "IngredientUsage")

    for recipe in Recipe.objects.all():
        for ingredient in recipe.ingredient_set.all():
            u = IngredientUsage(recipe=r, ingredient=i, quantity=1)
            u.save()

class Migration(migrations.Migration):

    dependencies = [
        ('recipes', '0009_auto_20150919_1226'),
    ]

    operations = [
        migrations.RunPython(change_to_usage),
    ]

from __future__ import unicode_literals

from django.db import models, migrations

def change_to_usage(apps, schema_editor):
    Recipe = apps.get_model("recipes", "Recipe")
    Ingredient = apps.get_model("recipes", "Ingredient")
    IngredientUsage = apps.get_model("recipes", "IngredientUsage")

    for recipe in Recipe.objects.all():
        for ingredient in recipe.ingredient_set.all():
            u = IngredientUsage(recipe=recipe, ingredient=ingredient,
                    quantity=1)
            u.save()

class Migration(migrations.Migration):

    dependencies = [
        ('recipes', '0009_auto_20150919_1226'),
    ]

    operations = [
        migrations.RunPython(change_to_usage),
    ]

Make the data migration actually work
Make the data migration actually work

  from __future__ import unicode_literals
  
  from django.db import models, migrations
  
  def change_to_usage(apps, schema_editor):
      Recipe = apps.get_model("recipes", "Recipe")
      Ingredient = apps.get_model("recipes", "Ingredient")
      IngredientUsage = apps.get_model("recipes", "IngredientUsage")
  
      for recipe in Recipe.objects.all():
          for ingredient in recipe.ingredient_set.all():
-             u = IngredientUsage(recipe=r, ingredient=i, quantity=1)
+             u = IngredientUsage(recipe=recipe, ingredient=ingredient,
+                     quantity=1)
              u.save()
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('recipes', '0009_auto_20150919_1226'),
      ]
  
      operations = [
          migrations.RunPython(change_to_usage),
      ]
  
Make the data migration actually work
## Code Before:
from __future__ import unicode_literals

from django.db import models, migrations

def change_to_usage(apps, schema_editor):
    Recipe = apps.get_model("recipes", "Recipe")
    Ingredient = apps.get_model("recipes", "Ingredient")
    IngredientUsage = apps.get_model("recipes", "IngredientUsage")

    for recipe in Recipe.objects.all():
        for ingredient in recipe.ingredient_set.all():
            u = IngredientUsage(recipe=r, ingredient=i, quantity=1)
            u.save()

class Migration(migrations.Migration):

    dependencies = [
        ('recipes', '0009_auto_20150919_1226'),
    ]

    operations = [
        migrations.RunPython(change_to_usage),
    ]

## Instruction:
Make the data migration actually work
## Code After:
from __future__ import unicode_literals

from django.db import models, migrations

def change_to_usage(apps, schema_editor):
    Recipe = apps.get_model("recipes", "Recipe")
    Ingredient = apps.get_model("recipes", "Ingredient")
    IngredientUsage = apps.get_model("recipes", "IngredientUsage")

    for recipe in Recipe.objects.all():
        for ingredient in recipe.ingredient_set.all():
            u = IngredientUsage(recipe=recipe, ingredient=ingredient,
                    quantity=1)
            u.save()

class Migration(migrations.Migration):

    dependencies = [
        ('recipes', '0009_auto_20150919_1226'),
    ]

    operations = [
        migrations.RunPython(change_to_usage),
    ]
