mysql - Cakephp 如何根据另一个表创建虚拟字段

Question

我有 2 个表:projects、project_types。

The relations are as follow:
    Project => belong to => ProjectType    
    ProjectType => hasMany   => Project

The columns are as follow
    Project => id, project_type_id, name, description  
    ProjectType => id, name

我如何创建一个名为 projectTypeName 的虚拟字段，其名称来自基于 project_type_id 的 projectType，对于那些 project_type_id = 0 的字段，它将是“”

我有这个

public $virtualFields = array(
    'projectTypeName' => "IF(Project.project_type_id = 9, 'sales', '')"     
);    

它正确显示为“销售额”，但我不想一一指定。

谢谢

Answer 1

这对我有用

public $virtualFields = array(
 'projectTypeName' => 'SELECT name FROM project_types where id = Project.project_type_id'
);