Laravel关系数据库-链接4个表

时间:2018-09-11 19:19:19

标签: laravel laravel-5 orm eloquent laravel-5.5

我对关系数据库比较陌生,因此我想出一种方法来从特定用户那里获取当天调查的答复。我的最终目标是检查用户在调查中走了多远,或者用户是否已完成该调查。感谢您的帮助。

我有一个参与者表,一个调查表,一个调查问题表和一个调查答复表。

  • 每个参与者都有很多调查

  • 每个参与者对调查问题都有很多回答(2)

  • 每个调查都有很多问题

  • 每个问题都有一个答案

我不确定是否应该建立“ hasManyThrough”关系。到目前为止,使用我的模型,我可以找到参与者,然后找到相应的调查,然后从该调查中收集问题。这是链条断裂的地方,我无法使用从调查中检索到的问题,也无法使用我的“ SurveyResponse”模型找到他们的答案。有人可以帮我弄清楚我的数据库结构/关系是否正确吗?

我的控制器(我可以到达它回显$ question-> body的位置,但是我无法使用$ question-> responses()-> get之类的东西来检查对问题的响应):< / p>

public function findResponses(Request $request)
{
    $participant_id = '1234';
    $surveyDate = new Carbon();
    $surveyDate = $surveyDate->toDateString();
    $participant = Participant::where('user_id', $participant_id)->first();

    // check if participant daily survey is initiated
    $surveyStarted = $participant->dailySurveyInitiated;

    if($surveyStarted)
    {
        $activeSurveyParticipant = Participant::where('user_id', $participant_id)->first();
        // find survey for that date corresponding to that user
        $activeSurvey = Survey::where('survey_Date', $surveyDate)->where('participant_id', $participant_id)->first();

        $surveyID = $activeSurvey->id;
        // gather the questions
        $activeSurveyQuestions = $activeSurvey->SurveyQuestions()->where('survey_id', '=', $surveyID)->get();
        // check to see what questions have been answered

        foreach($activeSurveyQuestions as $question)
        {
            echo $question->body;
            echo '<br>';

            // really want to gather the responses to each 
            // question based off the participant_id...
            // something like
            // $currentQ = $question->SurveyResponse::where('response', '!=', null)->get();
            // echo $currentQ->response;

        }

    }
    else
    {

    }
}

我的参与者模型:

class Participant extends Model
{
    protected $table = 'participants';
    protected $primaryKey = "user_id";

    public function surveys()
    {
        return $this->hasMany('App\Survey', 'participant_id', 'user_id');
    }

    public function surveyQuestionResponses()
    {
        return $this->hasMany('App\Survey', 'App\SurveyQuestionResponses');
    }

    public function surveyResponses()
    {
        return $this->hasManyThrough('App\SurveyResponse', 'App\SurveyQuestion');
    }
}

参与者表:

class CreateParticipantsTable extends Migration
{
protected $primaryKey = 'user_id';
protected $incrementing = false;

public function up()
{
    Schema::create('participants', function (Blueprint $table) 
    {
        $table->engine = 'InnoDB';
        $table->string('user_id')->unique();
        $table->boolean('subscribed')->default(0);
        $table->boolean('dailySurveyInitiated')->default(0)->nullable();
        $table->integer('dailySurveyCompleted')->default(0)->nullable();

        $table->boolean('studyCompleted')->default(0);

        $table->timestamps();
    });
}

我的调查模型:

class Survey extends Model
{
    protected $table = 'surveys';

    public function SurveyQuestions()
    {
        return $this->hasMany('App\SurveyQuestion');
    }
    // Participant
    public function participant()
    {
        return $this->belongsToMany('App\Participant', 'user_id', 'participant_id');
    }
}

我的调查表:

class CreateSurveysTable extends Migration
{
    public function up()
    {
        Schema::create('surveys', function (Blueprint $table) 
        {
            $table->engine = 'InnoDB';
            $table->increments('id');
            $table->string('participant_id')->nullable();
            $table->string('survey_date')->nullable();
            $table->boolean('completed')->nullable()->default(0);
            $table->timestamps();
        });

        Schema::table('surveys', function($table) {
            $table->foreign('participant_id')->references('user_id')->on('participants');
        });
    }
}

我的SurveyQuestions模型:

class SurveyQuestion extends Model
{
    protected $table = 'survey_questions';

    public function survey()
    {
        return $this->belongsTo('App\Survey', 'survey_id');
    }

    public function participant()
    {
        return $this->belongsTo('App\Participant', 'participant_id');
    }

    public function responses()
    {
        return $this->hasMany('App\SurveyResponse', 'question_id');
    }
}

我的SurveyQuestions表:

class CreateSurveyQuestionsTable extends Migration
{
    public function up()
    {
        Schema::create('survey_questions', function (Blueprint $table) 
        {
            $table->engine = 'InnoDB';
            $table->increments('id');
            $table->string('body')->nullable();
            $table->enum('type', ['numeric', 'image'])->nullable();
            $table->integer('survey_id')->nullable();
            $table->timestamps();
        });

        Schema::table('survey_questions', function($table) {
            $table->foreign('survey_id')->references('id')->on('surveys');
        });
    }
}

我的SurveyResponse模型:

class SurveyResponse extends Model
{
    protected $table = 'survey_responses';

    public function question()
    {
        return $this->belongsTo('App\SurveyQuestion');
    }
    public function participant()
    {
        return $this->belongsTo('App\Participant');
    }
}

我的SurveyResponse表:

class CreateSurveyResponsesTable extends Migration
{
    public function up()
    {
        Schema::create('survey_responses', function (Blueprint $table) 
        {
            $table->engine = 'InnoDB';
            $table->increments('id');
            $table->string('participant_id')->nullable();
            $table->integer('question_id')->nullable();
            $table->integer('survey_id')->nullable();
            $table->string('session_sid')->nullable();

            $table->text('response')->nullable();
            $table->enum('type', ['numeric', 'image'])->nullable();

            $table->string('mediaSID')->index()->nullable();
            $table->string('messageSID')->index()->nullable();
            $table->string('mediaURL')->index()->nullable();
            $table->binary('media')->nullable();
            $table->string('filename')->index()->nullable();
            $table->string('MIMEType')->nullable();

            $table->timestamps();
        });

        Schema::table('survey_responses', function($table) {
            $table->foreign('participant_id')->references('user_id')->on('participants');
            $table->foreign('question_id')->references('id')->on('survey_questions');
            $table->foreign('survey_id')->references('survey_id')->on('survey_questions');
        });
    }
}

0 个答案:

没有答案