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实例公有方法

check_int_in_range(value)

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 81
        def check_int_in_range(value)
          if value.to_int > 9223372036854775807 || value.to_int < -9223372036854775808
            exception = <<~ERROR
              Provided value outside of the range of a signed 64bit integer.

              PostgreSQL will treat the column type in question as a numeric.
              This may result in a slow sequential scan due to a comparison
              being performed between an integer or bigint value and a numeric value.

              To allow for this potentially unwanted behavior, set
              ActiveRecord.raise_int_wider_than_64bit to false.
            ERROR
            raise IntegerOutOf64BitRange.new exception
          end
        end

escape_bytea(value)

为数据库的 bytea 输入转义二进制字符串。

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 70
def escape_bytea(value)
  valid_raw_connection.escape_bytea(value) if value
end

quote_schema_name(schema_name)

为 SQL 查询中的使用引用模式名称。

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 138
def quote_schema_name(schema_name)
  quote_column_name(schema_name)
end

quote_table_name_for_assignment(table, attr)

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 133
def quote_table_name_for_assignment(table, attr)
  quote_column_name(attr)
end

unescape_bytea(value)

将数据库中转义的 bytea 输出取消转义为它所代表的二进制字符串。注意:这不是 escape_bytea 的逆运算!这仅用于数据库驱动程序输出的转义二进制输出。

# File activerecord/lib/active_record/connection_adapters/postgresql/quoting.rb, line 77
def unescape_bytea(value)
  valid_raw_connection.unescape_bytea(value) if value
end