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This django Migration Operation can be used to transfera fields default value to the database scheme.

Project description

Django Migration Operation that can be used to transfer a field’s default value to the database scheme.

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Dependencies

  • MySQL (or compatible)
  • PostgreSQL

Installation

pip install django-add-default-value

You can then use AddDefaultValue in your migration file to transfer the default values to your database. Afterwards, it’s just the usual ./manage.py migrate.

Usage

Add this manually to a autogenerated Migration, that adds a new fiels:

AddDefaultValue(
    model_name='my_model',
    name='my_field',
    value='my_default'
)

Example

Given the following migration:

operations = [
    migrations.AddField(
        field=models.CharField(default='my_default', max_length=255),
        model_name='my_model',
        name='my_field',
    ),
]

Modify the migration to add a default value:

+from django_add_default_value import AddDefaultValue
+
 operations = [
     migrations.AddField(
         field=models.CharField(default='my_default', max_length=255),
         model_name='my_model',
         name='my_field',
     ),
+    AddDefaultValue(
+        model_name='my_model',
+        name='my_field',
+        value='my_default'
+    )
 ]

If you check python manage.py sqlmigrate [app name] [migration], you will see that the default value now gets set.

Contributing

First of all, thank you very much for contributing to this project. Please base your work on the master branch and target master in your pull request.

License

django-add-default-value is released under the Apache 2.0 License.

Project details


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django-add-default-value-0.0.6.tar.gz (3.8 kB) Copy SHA256 hash SHA256 Source None Aug 9, 2018

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