Java – customize crud list in playframework html

Hello

My model is like this

I have an object related to other objects, as follows:

@Entity
public class MyObjectA extends Model {

    @required
    public String myObjectAName;

    ...

    @required
    @ManyToOne
    public MyObjectB myObjectB;
}

Now on the list I covered In HTML, I have this

<div id="crudListTable">
    #{crud.table fields:['myObjectB','myObjectAName'] /}
</div>

Now, call the following URL in the browser. http://myplayapp/admin/myObjectAs When executed, this code displays something similar

myObjectB __ myObjectAName

MyObjectB [1] __ Hey, this is myobjectaname's name myobjectb [2]__ Hey, that's another name for myobjectaname

Note that the object name and object ID in [] are used in my myobjectb

So to display the myobjectbname attribute of myobjectb in the above list, I'll try this:

<div id="crudListTable">
    #{crud.table fields:['myObjectB.myObjectBName','myObjectAName'] /}
</div>

But then I got the mistake

Of course, myobjectb has a public attribute myobjectbname

So what did I do wrong here?

Solution

It doesn't work because the fields parameter only displays a list of field names of the class to be displayed (here myobjecta), and "myobjectb. Myobjectbname" is not the name of the field in myobjecta

There are two ways to do this:

The simple solution is to override the toString () method of myobjectb The disadvantage of this is that the same string is used every time myobjectb is displayed, which may not be what you want

Example:

public class MyObjectB extends Model {

  // ...

  @Override
  public String toString(() {
    return this.myObjectBName;
  }

}

The list specific solution is to use crud custom tag.

Example:

#{crud.table fields:['myObjectB','myObjectAName']}
   #{crud.custom 'myObjectB'}
       ${object.myObjectB.myObjectBName}
   #{/crud.custom}
#{/crud.table}