Question

如果我想搜索空列表，如何查询数组值？我现在正在做：

let options = {columns: [  'Action.name', 'completed_At as completedAt', 
                       'deadline', 'notes', 
                       'ActionAssignedTo.action_Id as actionId',
           ]};

  let action2 = new Action(); 

  action2.query().innerJoin('Employee',  function () {
                            this.on('Action.created_By_Id', 'Employee.id')
                           .andOn('Employee.vendor_Id', bookshelf.knex.raw(1));
  });

  action2.query().innerJoin('ActionAssignedTo',  function () {
                            this.on('Action.id',  'ActionAssignedTo.action_Id')                    
                           .andOn('ActionAssignedTo.action_Id', bookshelf.knex.raw(5));
  });

  action2.query().where(function() {
        this.where('Action.created_By_Id', empId)
  });
  action2.query().groupBy('Action.id'); 
  action2.query().limit(2);
  action2.query().columns(options.columns);


  let action1; 

  action1 =  Action.where('id', actionId);
  action1.query().columns('id');

  return bookshelf.knex.raw('select * from ' 
                    + '(' + action1.query().toString() + ') AS act1'
                    + ' left Outer Join '
                    + '(' + action2.query().toString() + ') AS act2'
                    + ' on act1.id = act2.actionId');

但是，这不起作用。

Answer 1

query.whereEqualTo("friendsList","");

只有当你的朋友列表包含空格，即[＆＃34;＆＃34;]而不是null，即[]时，此查询才有效。

解析数组上的查询（搜索列表是否为空）

1 个答案: