method
foreign_key_exists?
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Class: ActiveRecord::ConnectionAdapters::SchemaStatements
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- What's this?
foreign_key_exists?(from_table, to_table = nil, **options)
public
Checks to see if a foreign key exists on a table for a given foreign key definition.
# Checks to see if a foreign key exists. foreign_key_exists?(:accounts, :branches) # Checks to see if a foreign key on a specified column exists. foreign_key_exists?(:accounts, column: :owner_id) # Checks to see if a foreign key with a custom name exists. foreign_key_exists?(:accounts, name: "special_fk_name")