method

table_structure_with_collation

v6.1.7.7 - Show latest stable - 0 notes - Class: ActiveRecord::ConnectionAdapters::SQLite3Adapter

1.0.0
1.1.6
1.2.6
2.0.3
2.1.0
2.2.1
2.3.8
3.0.0
3.0.9
3.1.0
3.2.1
3.2.8
3.2.13
4.0.2
4.1.8
4.2.1
4.2.7
4.2.9
5.0.0.1 (0)
5.1.7 (0)
5.2.3 (0)
6.0.0 (0)
6.1.3.1 (0)
6.1.7.7 (0)
7.0.0 (0)
7.1.3.2 (0)
7.1.3.4 (0)
What's this?

table_structure_with_collation(table_name, basic_structure) private

No documentation

This method has no description. You can help the Ruby on Rails community by adding new notes.

# File activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb, line 487
        def table_structure_with_collation(table_name, basic_structure)
          collation_hash = {}
          sql = <<~SQL
            SELECT sql FROM
              (SELECT * FROM sqlite_master UNION ALL
               SELECT * FROM sqlite_temp_master)
            WHERE type = 'table' AND name = #{quote(table_name)}
          SQL

          # Result will have following sample string
          # CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
          #                       "password_digest" varchar COLLATE "NOCASE");
          result = query_value(sql, "SCHEMA")

          if result
            # Splitting with left parentheses and discarding the first part will return all
            # columns separated with comma(,).
            columns_string = result.split("(", 2).last

            columns_string.split(",").each do |column_string|
              # This regex will match the column name and collation type and will save
              # the value in $1 and $2 respectively.
              collation_hash[$1] = $2 if COLLATE_REGEX =~ column_string
            end

            basic_structure.map do |column|
              column_name = column["name"]

              if collation_hash.has_key? column_name
                column["collation"] = collation_hash[column_name]
              end

              column
            end
          else
            basic_structure.to_a
          end
        end

table_structure_with_collation

Related methods

No documentation