Class FieldOperation

Declaration

Methods

• ▶ def __init__(self, model_name, name, field=None)

  source link

  Overrides

  This method is overriden in:

  • django.db.migrations.operations.fields.AddField
  • django.db.migrations.operations.fields.AlterField
  • django.db.migrations.operations.fields.RenameField
• ▷ def is_same_field_operation(self, operation)

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• ▷ def is_same_model_operation(self, operation)

  source link
• ▷ def model_name_lower(self) @cached_property

  @cached_property
  def model_name_lower(self)

  source link
• ▷ def name_lower(self) @cached_property

  @cached_property
  def name_lower(self)

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• ▶ def reduce(self, operation, app_label) override

  inherited doc Return either a list of operations the actual operation should be replaced with or a boolean that indicates whether or not the specified operation can be optimized across.

  source link

  This method overrides django.db.migrations.operations.base.Operation.reduce.

  Overrides

  This method is overriden in:

  • django.db.migrations.operations.fields.AddField
  • django.db.migrations.operations.fields.RemoveField
  • django.db.migrations.operations.fields.AlterField
  • django.db.migrations.operations.fields.RenameField
• ▶ def references_field(self, model_name, name, app_label) override

  inherited doc Return True if there is a chance this operation references the given field name, with an app label for accuracy.

  source link

  This method overrides django.db.migrations.operations.base.Operation.references_field.

  Used for optimization. If in doubt, return True.

  Overrides

  This method is overriden in:

  • django.db.migrations.operations.fields.RenameField
• ▶ def references_model(self, name, app_label) override

  inherited doc Return True if there is a chance this operation references the given model name (as a string), with an app label for accuracy.

  source link

  This method overrides django.db.migrations.operations.base.Operation.references_model.

  Used for optimization. If in doubt, return True;
  returning a false positive will merely make the optimizer a little
  less efficient, while returning a false negative may result in an
  unusable optimized migration.

Inherited methods

• Methods inherited from django.db.migrations.operations.base.Operation:
  __new__, __repr__, allow_migrate_model, database_backwards, database_forwards, deconstruct, describe, migration_name_fragment, state_forwards

Subclasses

• django.db.migrations.operations.fields.AddField
• django.db.migrations.operations.fields.RemoveField
• django.db.migrations.operations.fields.AlterField
• django.db.migrations.operations.fields.RenameField

Reexports

• Imported in django.db.migrations.operations.models.

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