Module: HairTrigger::Adapter

Defined in:
lib/hair_trigger/adapter.rb

Instance Method Summary collapse

Instance Method Details

#create_trigger(name = nil, options = {}) ⇒ Object 



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# File 'lib/hair_trigger/adapter.rb', line 3

def create_trigger(name = nil, options = {})
  if name.is_a?(Hash)
    options = name
    name = nil
  end
  ::HairTrigger::Builder.new(name, options.merge(:execute => true, :adapter => self))
end

#drop_trigger(name, table, options = {}) ⇒ Object 



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# File 'lib/hair_trigger/adapter.rb', line 11

def drop_trigger(name, table, options = {})
  ::HairTrigger::Builder.new(name, options.merge(:execute => true, :drop => true, :table => table, :adapter => self)).all{}
end

#triggers(options = {}) ⇒ Object 



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# File 'lib/hair_trigger/adapter.rb', line 15

def triggers(options = {})
  triggers = {}
  name_clause = options[:only] ? "IN ('" + options[:only].join("', '") + "')" : nil
  adapter_name = HairTrigger.adapter_name_for(self)
  case adapter_name
    when :sqlite
      select_rows("SELECT name, sql FROM sqlite_master WHERE type = 'trigger' #{name_clause ? " AND name " + name_clause : ""}").each do |(name, definition)|
        triggers[name] = definition + ";\n"
      end
    when :mysql
      select_rows("SHOW TRIGGERS").each do |(name, event, table, actions, timing, created, sql_mode, definer)|
        next if options[:only] && !options[:only].include?(name)
        triggers[name.strip] = "CREATE \#{definer != \"\#{@config[:username] || 'root'}@\#{@config[:host] || 'localhost'}\" ? \"DEFINER = \#{definer} \" : \"\"}TRIGGER \#{name} \#{timing} \#{event} ON \#{table}\nFOR EACH ROW\n\#{actions}\n        SQL\n      end\n    when :postgresql, :postgis\n      function_conditions = \"(SELECT typname FROM pg_type WHERE oid = prorettype) = 'trigger'\"\n      function_conditions << <<-SQL unless options[:simple_check]\n        AND oid IN (\n          SELECT tgfoid\n          FROM pg_trigger\n          WHERE NOT tgisinternal AND tgconstrrelid = 0 AND tgrelid IN (\n            SELECT oid FROM pg_class WHERE relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = 'public')\n          )\n        )\n      SQL\n      function_conditions = \n      sql = <<-SQL\n        SELECT tgname::varchar, pg_get_triggerdef(oid, true)\n        FROM pg_trigger\n        WHERE NOT tgisinternal AND tgconstrrelid = 0 AND tgrelid IN (\n          SELECT oid FROM pg_class WHERE relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = 'public')\n        )\n        \n        \#{name_clause ? \" AND tgname::varchar \" + name_clause : \"\"}\n        UNION\n        SELECT proname || '()', pg_get_functiondef(oid)\n        FROM pg_proc\n        WHERE \#{function_conditions}\n          \#{name_clause ? \" AND (proname || '()')::varchar \" + name_clause : \"\"}\n      SQL\n      select_rows(sql).each do |(name, definition)|\n        triggers[name] = definition\n      end\n    else\n      raise \"don't know how to retrieve \#{adapter_name} triggers yet\"\n  end\n  triggers\nend\n"