offshore/lib/offshore/query/adapters.js

An ORM for Node.js

/**
 * Mixes Custom Non-CRUD Adapter Methods into the prototype.
 */

module.exports = function() {
  var self = this;

  Object.keys(this.connections).forEach(function(conn) {

    var adapter = self.connections[conn]._adapter || {};

    Object.keys(adapter).forEach(function(key) {

      // Ignore the Identity Property
      if (['identity', 'tableName'].indexOf(key) >= 0) return;

      // Don't override keys that already exists
      if (self[key]) return;

      // Don't override a property, only functions
      if (typeof adapter[key] != 'function') {
        self[key] = adapter[key];
        return;
      }

      // Apply the Function with passed in args and set this.identity as
      // the first argument
      self[key] = function() {

        var tableName = self.tableName || self.identity;

        // If this is the teardown method, just pass in the connection name,
        // otherwise pass the connection and the tableName
        var defaultArgs = key === 'teardown' ? [conn] : [conn, tableName];

        // Concat self.identity with args (must massage arguments into a proper array)
        // Use a normalized _tableName set in the core module.
        var args = defaultArgs.concat(Array.prototype.slice.call(arguments));
        return adapter[key].apply(self, args);
      };
    });
  });

};