Module: MysqlCompat
- Defined in:
- lib/mysql_replication_adapter.rb
Overview
:nodoc:
Class Method Summary collapse
-
.define_all_hashes_method! ⇒ Object
add all_hashes method to standard mysql-c bindings or pure ruby version.
Class Method Details
.define_all_hashes_method! ⇒ Object
add all_hashes method to standard mysql-c bindings or pure ruby version
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# File 'lib/mysql_replication_adapter.rb', line 16 def self.define_all_hashes_method! raise 'Mysql not loaded' unless defined?(::Mysql) target = defined?(Mysql::Result) ? Mysql::Result : MysqlRes return if target.instance_methods.include?('all_hashes') # Ruby driver has a version string and returns null values in each_hash # C driver >= 2.7 returns null values in each_hash if Mysql.const_defined?(:VERSION) && (Mysql::VERSION.is_a?(String) || Mysql::VERSION >= 20700) target.class_eval <<-'end_eval' def all_hashes rows = [] each_hash { |row| rows << row } rows end end_eval # adapters before 2.7 don't have a version constant # and don't return null values in each_hash else target.class_eval <<-'end_eval' def all_hashes rows = [] all_fields = fetch_fields.inject({}) { |fields, f| fields[f.name] = nil; fields } each_hash { |row| rows << all_fields.dup.update(row) } rows end end_eval end unless target.instance_methods.include?('all_hashes') raise "Failed to defined #{target.name}#all_hashes method. Mysql::VERSION = #{Mysql::VERSION.inspect}" end end |