Function addChainMethod

lib/ChainFind.js:294–331

(chain, association, opts)

}

function addChainMethod(chain, association, opts) {
  chain[association.hasAccessor] = function (value) {
    if (!opts.exists) {
      opts.exists = [];
    }
    var conditions = {};

    var assocIds = Object.keys(association.mergeAssocId);
    var ids = association.model.id;
    function mergeConditions(source) {
      for (var i = 0; i < assocIds.length; i++) {
        if (typeof conditions[assocIds[i]] === "undefined") {
          conditions[assocIds[i]] = source[ids[i]];
        } else if (Array.isArray(conditions[assocIds[i]])) {
          conditions[assocIds[i]].push(source[ids[i]]);
        } else {
          conditions[assocIds[i]] = [ conditions[assocIds[i]], source[ids[i]] ];
        }
      }
    }

    if (Array.isArray(value)) {
      for (var i = 0; i < value.length; i++) {
        mergeConditions(value[i]);
      }
    } else {
      mergeConditions(value);
    }

    opts.exists.push({
      table      : association.mergeTable,
      link       : [ Object.keys(association.mergeId), association.model.id ],
      conditions : conditions
    });

    return chain;
  };
}