remove_foreign_key
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- What's this?
remove_foreign_key(from_table, to_table = nil, **options)
public
Removes the given foreign key from the table. Any option parameters provided will be used to re-add the foreign key in case of a migration rollback. It is recommended that you provide any options used when creating the foreign key so that the migration can be reverted properly.
Removes the foreign key on accounts.branch_id.
remove_foreign_key :accounts, :branches
Removes the foreign key on accounts.owner_id.
remove_foreign_key :accounts, column: :owner_id
Removes the foreign key on accounts.owner_id.
remove_foreign_key :accounts, to_table: :owners
Removes the foreign key named special_fk_name on the accounts table.
remove_foreign_key :accounts, name: :special_fk_name
Checks if the foreign key exists before trying to remove it. Will silently ignore indexes that don’t exist.
remove_foreign_key :accounts, :branches, if_exists: true
The options hash accepts the same keys as SchemaStatements#add_foreign_key with an addition of
- :to_table
-
The name of the table that contains the referenced primary key.