diff options
Diffstat (limited to 'activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb')
-rw-r--r-- | activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb new file mode 100644 index 0000000000..e02491edb6 --- /dev/null +++ b/activerecord/lib/active_record/connection_adapters/sqlite3/schema_statements.rb @@ -0,0 +1,92 @@ +module ActiveRecord + module ConnectionAdapters + module SQLite3 + module SchemaStatements # :nodoc: + # Returns an array of indexes for the given table. + def indexes(table_name, name = nil) + if name + ActiveSupport::Deprecation.warn(<<-MSG.squish) + Passing name to #indexes is deprecated without replacement. + MSG + end + + exec_query("PRAGMA index_list(#{quote_table_name(table_name)})", "SCHEMA").map do |row| + index_sql = select_value(<<-SQL, "SCHEMA") + SELECT sql + FROM sqlite_master + WHERE name = #{quote(row['name'])} AND type = 'index' + UNION ALL + SELECT sql + FROM sqlite_temp_master + WHERE name = #{quote(row['name'])} AND type = 'index' + SQL + + /\sWHERE\s+(?<where>.+)$/i =~ index_sql + + columns = exec_query("PRAGMA index_info(#{quote(row['name'])})", "SCHEMA").map do |col| + col["name"] + end + + IndexDefinition.new( + table_name, + row["name"], + row["unique"] != 0, + columns, + where: where + ) + end + end + + private + def schema_creation + SQLite3::SchemaCreation.new(self) + end + + def create_table_definition(*args) + SQLite3::TableDefinition.new(*args) + end + + def new_column_from_field(table_name, field) + default = \ + case field["dflt_value"] + when /^null$/i + nil + when /^'(.*)'$/m + $1.gsub("''", "'") + when /^"(.*)"$/m + $1.gsub('""', '"') + else + field["dflt_value"] + end + + type_metadata = fetch_type_metadata(field["type"]) + Column.new(field["name"], default, type_metadata, field["notnull"].to_i == 0, table_name, nil, field["collation"]) + end + + def data_source_sql(name = nil, type: nil) + scope = quoted_scope(name, type: type) + scope[:type] ||= "'table','view'" + + sql = "SELECT name FROM sqlite_master WHERE name <> 'sqlite_sequence'" + sql << " AND name = #{scope[:name]}" if scope[:name] + sql << " AND type IN (#{scope[:type]})" + sql + end + + def quoted_scope(name = nil, type: nil) + type = \ + case type + when "BASE TABLE" + "'table'" + when "VIEW" + "'view'" + end + scope = {} + scope[:name] = quote(name) if name + scope[:type] = type if type + scope + end + end + end + end +end |