instance method `index_exists?`

Ruby on Rails 2.3.18

Since v2.3.18

Available in: v2.3.18 v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

index_exists?(table_name, index_name, default)

Verify the existence of an index.

The default argument is returned if the underlying implementation does not define the indexes method, as there’s no way to determine the correct answer in that case.

Parameters

table_name req
index_name req
default req

Source

# File activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb, line 348
      def index_exists?(table_name, index_name, default)
        return default unless respond_to?(:indexes)
        index_name = index_name.to_s
        indexes(table_name).detect { |i| i.name == index_name }
      end

Defined in activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb line 348 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::ConnectionAdapters::SchemaStatements

Signature

Parameters