在 Yii2 中，模型 load 时，一直返回 false

1、在 Yii2 中，模型 load 时，一直返回 false。如图1

图1

        $conventionParticipantShareFilterCreate = new ConventionParticipantShareFilterCreate();
        $data = [
            'convention_id' => $conventionId,
            'conditions' => Json::encode(Yii::$app->request->post()),
        ];
        if (!$conventionParticipantShareFilterCreate->load($data)) {
            return [
                'code' => 13002,
                'message' => '填充模型失败',
            ];
        }

    /**
     * {@inheritdoc}
     */
    public function rules(): array
    {
        return [
            [['convention_id'], 'required'],
            [['conditions'], 'string'],
            [['convention_id'], 'string', 'max' => 20],
        ];
    }

2、找到原因，load 方法的 $formName 参数需要赋值为 ”，填充模型成功

        $conventionParticipantShareFilterCreate = new ConventionParticipantShareFilterCreate();
        $data = [
            'convention_id' => $conventionId,
            'conditions' => Json::encode(Yii::$app->request->post()),
        ];
        if (!$conventionParticipantShareFilterCreate->load($data, '')) {
            return [
                'code' => 13002,
                'message' => '填充模型失败',
            ];
        }