diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/abstract')
-rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb | 9 | ||||
-rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb | 8 |
2 files changed, 14 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb index 30ccb8f0a4..2859fb31e8 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/database_limits.rb @@ -17,6 +17,15 @@ module ActiveRecord 64 end + # Returns the maximum allowed length for an index name. This + # limit is enforced by rails and Is less than or equal to + # <tt>index_name_length</tt>. The gap between + # <tt>index_name_length</tt> is to allow internal rails + # opreations to use prefixes in temporary opreations. + def allowed_index_name_length + index_name_length + end + # Returns the maximum length of an index name. def index_name_length 64 diff --git a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb index cdc8433185..2c0a18fd01 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb @@ -647,10 +647,11 @@ module ActiveRecord index_name = index_name(table_name, column: column_names) if Hash === options # legacy support, since this param was a string - options.assert_valid_keys(:unique, :order, :name, :where, :length) + options.assert_valid_keys(:unique, :order, :name, :where, :length, :internal) index_type = options[:unique] ? "UNIQUE" : "" index_name = options[:name].to_s if options.key?(:name) + max_index_length = options.fetch(:internal, false) ? index_name_length : allowed_index_name_length if supports_partial_index? index_options = options[:where] ? " WHERE #{options[:where]}" : "" @@ -665,10 +666,11 @@ module ActiveRecord end index_type = options + max_index_length = allowed_index_name_length end - if index_name.length > index_name_length - raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' is too long; the limit is #{index_name_length} characters" + if index_name.length > max_index_length + raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' is too long; the limit is #{max_index_length} characters" end if index_name_exists?(table_name, index_name, false) raise ArgumentError, "Index name '#{index_name}' on table '#{table_name}' already exists" |