Yii2 viaTable 多对多。表没有关系。急于加载

Question

有 2 个 tables 多对多和另一个 Intermediary able

$this->createTable('tweet',[
    'id' => Schema::TYPE_PK,
    'text' => Schema::TYPE_STRING.' NOT NULL',
    'date_written' => Schema::TYPE_STRING.' NOT NULL',
    'date_imported' => Schema::TYPE_STRING.' NOT NULL',
],"ENGINE=InnoDB DEFAULT CHARSET=utf8");
$this->createTable('hashtag',[
    'text' => $this->string(),
    'PRIMARY KEY(text)'
],"ENGINE=InnoDB DEFAULT CHARSET=utf8");
$this->createTable('tweet_hashtag', [
    'tweet_id' => $this->integer(),
    'hashtag_text' => $this->string(),
    'PRIMARY KEY(tweet_id, hashtag_text)'
],"ENGINE=InnoDB DEFAULT CHARSET=utf8");

$this->createIndex('idx-tweet_hashtag-tweet_id', 'tweet_hashtag', 'tweet_id');
$this->createIndex('idx-tweet_hashtag-hashtag_text', 'tweet_hashtag', 'hashtag_text');

$this->addForeignKey('fk-tweet_hashtag-tweet_id', 'tweet_hashtag', 'tweet_id', 'tweet', 'id', 'CASCADE');
$this->addForeignKey('fk-tweet_hashtag-hashtag_text', 'tweet_hashtag', 'hashtag_text', 'hashtag', 'text', 'CASCADE');

Table 推文

public function getTweetHashtags()
{
    return $this->hasMany(TweetHashtag::className(), ['tweet_id' => 'id']);
}
public function getHashtagTexts()
{
    return $this->hasMany(Hashtag::className(), ['text' => 'hashtag_text'])->viaTable('tweet_hashtag', ['tweet_id' => 'id']);
}

Table tweet_hashtag

   public function getHashtagText()
    {
        return $this->hasOne(Hashtag::className(), ['text' => 'hashtag_text']);
    }
    public function getTweet()
    {
        return $this->hasOne(Tweet::className(), ['id' => 'tweet_id']);
    }

Table 话题标签

    public function getTweetHashtags()
    {
        return $this->hasMany(TweetHashtag::className(), ['hashtag_text' => 'text']);
    }

    public function getTweets()
    {
        return $this->hasMany(Tweet::className(), ['id' => 'tweet_id'])->viaTable('tweet_hashtag', ['hashtag_text' => 'text']);
    }

当我尝试 Tweet::find()->with('hashtag')->where(['id' => $tweetID])->all() 有异常

Exception 'yii\base\InvalidParamException' with message 'app\models\Tweet has no relation named "hashtag".'

如何正确地进行预加载。要从话题标签 table 中获取 'text'，通过推文 table.

中的 id

Answer 1

您应该使用名称或关系

Tweet::find()->with('tweetHashtags')->where(['id' => $tweetID])->all()

Yii2 viaTable 多对多。表没有关系。急于加载

Yii2 viaTable many-to-many. Tables has no relation. Eagre loading

php

many-to-many

yii2