Module: ArJdbc::MySQL::BulkChangeTable
- Included in:
- ArJdbc::MySQL
- Defined in:
- lib/arjdbc/mysql/bulk_change_table.rb
Instance Method Summary collapse
- #add_column_sql(table_name, column_name, type, options = {}) ⇒ Object protected
- #add_index_sql(table_name, column_name, options = {}) ⇒ Object protected
- #add_timestamps_sql(table_name) ⇒ Object protected
- #bulk_change_table(table_name, operations) ⇒ Object
- #change_column_sql(table_name, column_name, type, options = {}) ⇒ Object protected
- #remove_column_sql(table_name, column_name, type = nil, options = {}) ⇒ Object protected
- #remove_columns_sql(table_name, *column_names) ⇒ Object protected
- #remove_index_sql(table_name, options = {}) ⇒ Object protected
- #remove_timestamps_sql(table_name) ⇒ Object protected
- #rename_column_sql(table_name, column_name, new_column_name) ⇒ Object protected
- #supports_bulk_alter? ⇒ Boolean
Instance Method Details
#add_column_sql(table_name, column_name, type, options = {}) ⇒ Object (protected)
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# File 'lib/arjdbc/mysql/bulk_change_table.rb', line 28 def add_column_sql(table_name, column_name, type, = {}) add_column_sql = "ADD #{quote_column_name(column_name)} #{type_to_sql(type, [:limit], [:precision], [:scale])}" (add_column_sql, ) add_column_position!(add_column_sql, ) add_column_sql end |
#add_index_sql(table_name, column_name, options = {}) ⇒ Object (protected)
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# File 'lib/arjdbc/mysql/bulk_change_table.rb', line 77 def add_index_sql(table_name, column_name, = {}) index_name, index_type, index_columns = (table_name, column_name, ) "ADD #{index_type} INDEX #{index_name} (#{index_columns})" end |
#add_timestamps_sql(table_name) ⇒ Object (protected)
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# File 'lib/arjdbc/mysql/bulk_change_table.rb', line 87 def (table_name) [add_column_sql(table_name, :created_at, :datetime), add_column_sql(table_name, :updated_at, :datetime)] end |
#bulk_change_table(table_name, operations) ⇒ Object
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# File 'lib/arjdbc/mysql/bulk_change_table.rb', line 10 def bulk_change_table(table_name, operations) sqls = operations.map do |command, args| table, arguments = args.shift, args method = :"#{command}_sql" if respond_to?(method, true) send(method, table, *arguments) else raise "Unknown method called : #{method}(#{arguments.inspect})" end end sqls.flatten! execute("ALTER TABLE #{quote_table_name(table_name)} #{sqls.join(", ")}") end |
#change_column_sql(table_name, column_name, type, options = {}) ⇒ Object (protected)
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# File 'lib/arjdbc/mysql/bulk_change_table.rb', line 35 def change_column_sql(table_name, column_name, type, = {}) column = column_for(table_name, column_name) unless () [:default] = column.default end unless .has_key?(:null) [:null] = column.null end change_column_sql = "CHANGE #{quote_column_name(column_name)} #{quote_column_name(column_name)} #{type_to_sql(type, [:limit], [:precision], [:scale])}" (change_column_sql, ) add_column_position!(change_column_sql, ) change_column_sql end |
#remove_column_sql(table_name, column_name, type = nil, options = {}) ⇒ Object (protected)
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# File 'lib/arjdbc/mysql/bulk_change_table.rb', line 69 def remove_column_sql(table_name, column_name, type = nil, = {}) "DROP #{quote_column_name(column_name)}" end |
#remove_columns_sql(table_name, *column_names) ⇒ Object (protected)
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# File 'lib/arjdbc/mysql/bulk_change_table.rb', line 73 def remove_columns_sql(table_name, *column_names) column_names.map {|column_name| remove_column_sql(table_name, column_name) } end |
#remove_index_sql(table_name, options = {}) ⇒ Object (protected)
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# File 'lib/arjdbc/mysql/bulk_change_table.rb', line 82 def remove_index_sql(table_name, = {}) index_name = index_name_for_remove(table_name, ) "DROP INDEX #{index_name}" end |
#remove_timestamps_sql(table_name) ⇒ Object (protected)
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# File 'lib/arjdbc/mysql/bulk_change_table.rb', line 91 def (table_name) [remove_column_sql(table_name, :updated_at), remove_column_sql(table_name, :created_at)] end |
#rename_column_sql(table_name, column_name, new_column_name) ⇒ Object (protected)
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# File 'lib/arjdbc/mysql/bulk_change_table.rb', line 52 def rename_column_sql(table_name, column_name, new_column_name) = {} if column = columns(table_name).find { |c| c.name == column_name.to_s } [:default] = column.default [:null] = column.null [:auto_increment] = (column.extra == "auto_increment") else raise ActiveRecordError, "No such column: #{table_name}.#{column_name}" end current_type = select_one("SHOW COLUMNS FROM #{quote_table_name(table_name)} LIKE '#{column_name}'", 'SCHEMA')["Type"] rename_column_sql = "CHANGE #{quote_column_name(column_name)} #{quote_column_name(new_column_name)} #{current_type}" (rename_column_sql, ) rename_column_sql end |
#supports_bulk_alter? ⇒ Boolean
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# File 'lib/arjdbc/mysql/bulk_change_table.rb', line 6 def supports_bulk_alter? true end |