diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/schema_cache.rb')
-rw-r--r-- | activerecord/lib/active_record/connection_adapters/schema_cache.rb | 76 |
1 files changed, 60 insertions, 16 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/schema_cache.rb b/activerecord/lib/active_record/connection_adapters/schema_cache.rb index c29cf1f9a1..7d54fcf9a0 100644 --- a/activerecord/lib/active_record/connection_adapters/schema_cache.rb +++ b/activerecord/lib/active_record/connection_adapters/schema_cache.rb @@ -13,6 +13,7 @@ module ActiveRecord @columns_hash = {} @primary_keys = {} @data_sources = {} + @indexes = {} end def initialize_dup(other) @@ -21,22 +22,27 @@ module ActiveRecord @columns_hash = @columns_hash.dup @primary_keys = @primary_keys.dup @data_sources = @data_sources.dup + @indexes = @indexes.dup end def encode_with(coder) - coder["columns"] = @columns - coder["columns_hash"] = @columns_hash - coder["primary_keys"] = @primary_keys - coder["data_sources"] = @data_sources - coder["version"] = connection.migration_context.current_version + coder["columns"] = @columns + coder["primary_keys"] = @primary_keys + coder["data_sources"] = @data_sources + coder["indexes"] = @indexes + coder["version"] = connection.migration_context.current_version + coder["database_version"] = database_version end def init_with(coder) - @columns = coder["columns"] - @columns_hash = coder["columns_hash"] - @primary_keys = coder["primary_keys"] - @data_sources = coder["data_sources"] - @version = coder["version"] + @columns = coder["columns"] + @primary_keys = coder["primary_keys"] + @data_sources = coder["data_sources"] + @indexes = coder["indexes"] || {} + @version = coder["version"] + @database_version = coder["database_version"] + + derive_columns_hash_and_deduplicate_values end def primary_keys(table_name) @@ -57,6 +63,7 @@ module ActiveRecord primary_keys(table_name) columns(table_name) columns_hash(table_name) + indexes(table_name) end end @@ -72,9 +79,20 @@ module ActiveRecord # Get the columns for a table as a hash, key is the column name # value is the column object. def columns_hash(table_name) - @columns_hash[table_name] ||= Hash[columns(table_name).map { |col| - [col.name, col] - }] + @columns_hash[table_name] ||= columns(table_name).index_by(&:name) + end + + # Checks whether the columns hash is already cached for a table. + def columns_hash?(table_name) + @columns_hash.key?(table_name) + end + + def indexes(table_name) + @indexes[table_name] ||= connection.indexes(table_name) + end + + def database_version # :nodoc: + @database_version ||= connection.get_database_version end # Clears out internal caches @@ -83,11 +101,13 @@ module ActiveRecord @columns_hash.clear @primary_keys.clear @data_sources.clear + @indexes.clear @version = nil + @database_version = nil end def size - [@columns, @columns_hash, @primary_keys, @data_sources].map(&:size).inject :+ + [@columns, @columns_hash, @primary_keys, @data_sources].sum(&:size) end # Clear out internal caches for the data source +name+. @@ -96,19 +116,43 @@ module ActiveRecord @columns_hash.delete name @primary_keys.delete name @data_sources.delete name + @indexes.delete name end def marshal_dump # if we get current version during initialization, it happens stack over flow. @version = connection.migration_context.current_version - [@version, @columns, @columns_hash, @primary_keys, @data_sources] + [@version, @columns, {}, @primary_keys, @data_sources, @indexes, database_version] end def marshal_load(array) - @version, @columns, @columns_hash, @primary_keys, @data_sources = array + @version, @columns, _columns_hash, @primary_keys, @data_sources, @indexes, @database_version = array + @indexes ||= {} + + derive_columns_hash_and_deduplicate_values end private + def derive_columns_hash_and_deduplicate_values + @columns = deep_deduplicate(@columns) + @columns_hash = @columns.transform_values { |columns| columns.index_by(&:name) } + @primary_keys = deep_deduplicate(@primary_keys) + @data_sources = deep_deduplicate(@data_sources) + @indexes = deep_deduplicate(@indexes) + end + + def deep_deduplicate(value) + case value + when Hash + value.transform_keys { |k| deep_deduplicate(k) }.transform_values { |v| deep_deduplicate(v) } + when Array + value.map { |i| deep_deduplicate(i) } + when String, Deduplicable + -value + else + value + end + end def prepare_data_sources connection.data_sources.each { |source| @data_sources[source] = true } |