Php Yii2动态表单扩展

我是yii2.0新手，目前正在创建一个表单po 和po_项，问题是从数据库中更新modelPoItem为空的表单。 我感谢那些能够帮助我的人，他们用动态的形式为我提供了一个例子。提前感谢您

采购订单管理员

/**
     * Updates an existing Po model.
     * If update is successful, the browser will be redirected to the 'view' page.
     * @param integer $id
     * @return mixed
     */
    public function actionUpdate($id)
    {
        $model = $this->findModel($id);
        $modelsPoItem = [new PoItem];
        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            return $this->redirect(['view', 'id' => $model->id]);
        } else {
            return $this->render('update', [
                'model' => $model,
                'modelsPoItem' => (empty($modelsPoItem)) ? [new PoItem] : $modelsPoItem
            ]);
        }
    }

查看

<div class="po-form">

    <?php $form = ActiveForm::begin(['id' => 'dynamic-form']); ?>

    <?= $form->field($model, 'po_no')->textInput(['maxlength' => 10]) ?>
    <?= $form->field($model, 'description')->textarea(['rows' => 6]) ?>

    <div class="row">
        <div class="panel panel-default">
        <div class="panel-heading"><h4><i class="glyphicon glyphicon-envelope"></i> Po Items</h4></div>
        <div class="panel-body">
             <?php DynamicFormWidget::begin([
                'widgetContainer' => 'dynamicform_wrapper', // required: only alphanumeric characters plus "_" [A-Za-z0-9_]
                'widgetBody' => '.container-items', // required: css class selector
                'widgetItem' => '.item', // required: css class
                'limit' => 10, // the maximum times, an element can be cloned (default 999)
                'min' => 1, // 0 or 1 (default 1)
                'insertButton' => '.add-item', // css class
                'deleteButton' => '.remove-item', // css class
                'model' => $modelsPoItem[0],
                'formId' => 'dynamic-form',
                'formFields' => [
                    'po_item_no',
                    'quantity',
                ],
            ]); ?>
            <div class="container-items"><!-- widgetContainer -->
            <?php foreach ($modelsPoItem as $i => $modelPoItem): ?>

                <div class="item panel panel-default"><!-- widgetBody -->
                    <div class="panel-heading">
                        <h3 class="panel-title pull-left">Po Item</h3>
                        <div class="pull-right">
                            <button type="button" class="add-item btn btn-success btn-xs"><i class="glyphicon glyphicon-plus"></i></button>
                            <button type="button" class="remove-item btn btn-danger btn-xs"><i class="glyphicon glyphicon-minus"></i></button>
                        </div>
                        <div class="clearfix"></div>
                    </div>
                    <div class="panel-body">
                        <?php
                            // necessary for update action.
                            if (! $modelPoItem->isNewRecord) {
                                echo Html::activeHiddenInput($modelPoItem, "[{$i}]id");
                            }
                        ?>
                        <div class="row">
                            <div class="col-sm-6">

                                <?= $form->field($modelPoItem, "[{$i}]po_item_no")->textInput(['maxlength' => 128]) ?>
                            </div>
                            <div class="col-sm-6">
                                <?= $form->field($modelPoItem, "[{$i}]quantity")->textInput(['maxlength' => 128]) ?>
                            </div>
                        </div><!-- .row -->
                    </div>
                </div>
            <?php endforeach; ?>
            </div>
            <?php DynamicFormWidget::end(); ?>
        </div>
        </div>
    </div>
    <div class="form-group">
        <?= Html::submitButton($model->isNewRecord ? 'Create' : 'Update', ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
    </div>

    <?php ActiveForm::end(); ?>

</div>

采购订单项目
采购订单项目

您应该更改您的更新操作，如下所示：

public function actionUpdate($id)
{
    $model = $this->findModel($id);
    $modelsPoItem = $model->poItems;


    if ($model->load(Yii::$app->request->post()) && $model->save()) {

        $oldIDs = ArrayHelper::map($modelsPoItem, 'id', 'id');
        $modelsPoItem= Model::createMultiple(PoItem::className(),$modelsPoItem);
        Model::loadMultiple($modelsPoItem, Yii::$app->request->post());
        $deletedIDs = array_diff($oldIDs, array_filter(ArrayHelper::map($modelsPoItem, 'id', 'id')));


        // ajax validation
        if (Yii::$app->request->isAjax) {
            Yii::$app->response->format = Response::FORMAT_JSON;
            return ArrayHelper::merge(
                ActiveForm::validateMultiple($modelsPoItem),
                ActiveForm::validate($model)
            );
        }

        // validate all models
        $valid = $model->validate();
        $valid = Model::validateMultiple($modelsPoItem) && $valid;

        if ($valid) {
            $transaction = \Yii::$app->db->beginTransaction();
            try {
                if ($flag = $model->save(false)) {
                    if (! empty($deletedIDs)) {
                        PoItem::deleteAll(['id' => $deletedIDs]);
                    }

                    foreach ($modelsPoItem as $modelPoItem) {
                        $modelPoItem->po_id = $model->id;


                        if (! ( $flag = $modelPoItem->save(false))) {
                            $transaction->rollBack();
                            break;
                        }
                    }
                }
                if ($flag) {
                    $transaction->commit();
                    return $this->redirect(['view', 'id' => $model->id]);
                }
            } catch (Exception $e) {
                $transaction->rollBack();
            }
        }



    } else {

        return $this->render('update', [
            'model' => $model,
            'modelsPoItem' => (empty($modelsPoItem)) ? [new Model] : $modelsPoItem

        ]);
    }
}