mysql - Nodejs breeze-sequelize with MySQL - .select() 不工作

Question

我使用的是 breeze-sequelize 版本 0.0.18。当我尝试在 entityQuery 上使用 select() 时，出现奇怪的错误 _.pluck is not a function。如果我删除 .select()，它将正常工作。

我的 breeze 查询如下所示:

var predicate = Predicate.create('transactionDate', '>=', fromDate);
var entityQuery = EntityQuery.from('Transactions')
  .where(predicate)
  .select('transactionDate');
var sequelizeQuery = new SequelizeQuery(api.db, entityQuery);
return sequelizeQuery.execute();

返回时，我得到的错误是:

TypeError: _.pluck is not a function
at SequelizeQuery.<anonymous> (/Users/shu/Documents/project/node_modules/breeze-sequelize/SequelizeQuery.json.js:143:39)
at Array.map (native)
at SequelizeQuery._processSelect (/Users/shu/Documents/project/node_modules/breeze-sequelize/SequelizeQuery.json.js:136:56)
at SequelizeQuery._processQuery (/Users/shu/Documents/project/node_modules/breeze-sequelize/SequelizeQuery.json.js:72:8)
at new SequelizeQuery (/Users/shu/Documents/project/node_modules/breeze-sequelize/SequelizeQuery.json.js:43:23)
at getTransactions (/Users/shu/Documents/project/src/server/api/admin.controller.js:189:26)

出于好奇，我查看了我的 breeze-sequelize 库中的函数 SequelizeQuery._processSelect。错误来自 return usesNameOnServer ？ pp : _.pluck(props, "nameOnServer").join(".");.

SequelizeQuery.prototype._processSelect = function() {
var selectClause = this.entityQuery.selectClause;
  var usesNameOnServer = this.entityQuery.usesNameOnServer;
  if (selectClause == null) return;
  // extract any nest paths and move them onto the include
  var navPropertyPaths = [];
  this.sqQuery.attributes = selectClause.propertyPaths.map(function(pp) {
    var props = this.entityType.getPropertiesOnPath(pp, usesNameOnServer, true);
    var isNavPropertyPath = props[0].isNavigationProperty;
    if (isNavPropertyPath) {
      this._addInclude(this.sqQuery, props);
    }
    if (isNavPropertyPath) return null;
    return usesNameOnServer ?  pp : _.pluck(props, "nameOnServer").join(".");
  }, this).filter(function(pp) {
    return pp != null;
  });
}

有人可以帮助我吗？谢谢!

Answer 1

_.pluck 函数来自lodash , lodash 在 4.0 版本中移除了 pluck 功能

breeze-sequelize 库最终会更新到 lodash 4，但与此同时，请尝试使用 lodash 3.x。