Module: BetterRecord::Migration

Defined in:
lib/better_record/migration.rb

Instance Method Summary collapse

Instance Method Details

#audit_table(table_name, rows = nil, query_text = nil, skip_columns = %w[ updated_at ])) ⇒ Object 



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# File 'lib/better_record/migration.rb', line 5

def audit_table(table_name, rows = nil, query_text = nil, skip_columns = %w[ updated_at ])
  reversible do |d|
    d.up do
      if(rows && rows.is_a?(Array))
        skip_columns = rows
        rows = true
        query_text = true
      end

      if rows.nil? && skip_columns.is_a?(Array)
        rows = true
        query_text = query_text.nil? ? true : query_text
      end

      if(rows.nil? )
        execute "SELECT #{BetterRecord.db_audit_schema}.audit_table('#{table_name}');"
      else
        rows = !!rows ? 't' : 'f'
        query_text = !!query_text ? 't' : 'f'
        skip_columns = skip_columns.present? ? "'{#{skip_columns.join(',')}}'" : 'ARRAY[]'
        execute "SELECT #{BetterRecord.db_audit_schema}.audit_table('#{table_name}', BOOLEAN '#{rows}', BOOLEAN '#{query_text}', #{skip_columns}::text[]);"
      end
    end

    d.down do
      execute "DROP TRIGGER IF EXISTS audit_trigger_row ON #{table_name};"
      execute "DROP TRIGGER IF EXISTS audit_trigger_stm ON #{table_name};"
    end
  end
end

#login_triggers(table_name, password_col = 'password', email_col = 'email', function_name = nil, in_reverse = false) ⇒ Object 



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# File 'lib/better_record/migration.rb', line 36

def (table_name, password_col = 'password', email_col = 'email', function_name = nil, in_reverse = false)
  table_name = table_name.to_s

  reversible do |d|
    d.__send__(in_reverse ? :down : :up) do
      password_text = ''

      if !!password_col
        create_pwd_txt = ->(col) {
          <<-SQL
            IF (NEW.#{col} IS NOT NULL)
            AND (
              (TG_OP = 'INSERT') OR ( NEW.#{col} IS DISTINCT FROM OLD.#{col} )
            ) THEN
              IF (NEW.#{col} IS DISTINCT FROM 'CLEAR_EXISTING_PASSWORD_FOR_ROW') THEN
                NEW.#{col} = hash_password(NEW.#{col});
              ELSE
                NEW.#{col} = NULL;
              END IF;
            ELSE
              IF (TG_OP IS DISTINCT FROM 'INSERT') THEN
                NEW.#{col} = OLD.#{col};
              ELSE
                NEW.#{col} = NULL;
              END IF;
            END IF;

          SQL
        }
        password_text = password_col.is_a?(Array) ? (password_col.map {|pwd| create_pwd_txt.call(pwd)}).join("\n") : create_pwd_txt.call(password_col)
      end

      email_text = ''

      if !!email_col
        email_text = <<-SQL
          IF (TG_OP = 'INSERT') OR ( NEW.#{email_col} IS DISTINCT FROM OLD.#{email_col} ) THEN
            NEW.#{email_col} = validate_email(NEW.#{email_col});
          END IF;

        SQL
      end

      execute <<-SQL
        CREATE OR REPLACE FUNCTION #{function_name.presence || table_name.singularize}_changed()
          RETURNS TRIGGER AS
        $BODY$
        BEGIN
          #{password_text}
          #{email_text}
          RETURN NEW;
        END;
        $BODY$
        language 'plpgsql';
      SQL

      execute <<-SQL
        CREATE TRIGGER #{function_name.presence || table_name}_on_insert
        BEFORE INSERT ON #{table_name}
        FOR EACH ROW
        EXECUTE PROCEDURE #{function_name.presence || table_name.singularize}_changed();
      SQL

      execute <<-SQL
        CREATE TRIGGER #{function_name.presence || table_name}_on_update
        BEFORE UPDATE ON #{table_name}
        FOR EACH ROW
        EXECUTE PROCEDURE #{function_name.presence || table_name.singularize}_changed();

      SQL
    end

    d.__send__(in_reverse ? :up : :down) do
      execute "DROP TRIGGER IF EXISTS #{function_name.presence || table_name}_on_insert ON #{table_name};"
      execute "DROP TRIGGER IF EXISTS #{function_name.presence || table_name}_on_update ON #{table_name};"
    end
  end
end