douzhe2981 2016-06-28 00:00
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在SilverStripe中获取has_one关系

I have a DataObject called Applicant and it $has_one Member (this is the SilverStripe Member class).

private static $has_one = array (
    'MemberApplicant' => 'Member'
);

When a member is logged in and visits the ApplicationPage I want to be able to populate the form based on the members Applicant data.

I can make this work but I feel like I should be able to access the data easier.

Here is what I do:

$memberID = Member::currentUserID();
$applicant = Applicant::get()->filter('MemberApplicantID', $memberID)->first();

$form->loadDataFrom($applicant);

Shouldn't I be able to instantiate a Member and then call its relative $MemberApplicant?

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  • dsjlqkbpn029473708 2016-06-28 06:52
    关注

    Shouldn't I be able to instantiate a Member and then call its relative $MemberApplicant?

    Of course. I assume you have a 1:1 relation, then you have to define the counter part on Member using $belongs_to (see this diagram)

    class Applicant extends DataObject
    {
    private static $has_one = [
        'MemberApplicant' => 'Member'
    ];
    ...
    
    class MemberApplicantExtenension extends DataExtension
    {
    private static $belongs_to = [
        'Applicant' => 'Applicant'
    ];
    
    ...
    

    Now add the DataExtension to the Member object in /mysite/_config/config.yml

    Member:
      extensions:
        - MemberApplicantExtenension
    

    and run a dev/build?flush.

    Now you're able to get the related Applicant from the Member using built in ORM magic:

    //Get the current Member
    $member = Member::CurrentUser();
    
    //get the $belongs_to
    $applicant = $member->Applicant();
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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