Yii2 POST 图像在没有 Yii2 命名约定的情况下在 API 中建模 [英] Yii2 POST image to model in API without Yii2 Naming convention

问题描述

我正在为移动应用程序创建端点以将图像发送到服务器.我正在发布带有 POSTMAN 扩展名的 chrome 图像.图像位于 $_FILES 变量中，并命名为 image.如何将此图像加载到模型或 UploadedFile 类中?$model->load(Yii::$app->request->post()) 行没有正确加载文件，因为它不在 Yii2 的表单命名约定中.

I'm creating an endpoint for a mobile application to send a image to the server. I'm posting the image with the POSTMAN extension for chrome. The image is in the $_FILES variable, and named image. How can I load this image into a model, or the UploadedFile class? The $model->load(Yii::$app->request->post()) line does not correctly load the file, as it is not in Yii2's naming convention for forms.

它目前正在返回:

{
    "success": false,
    "message": "Required parameter 'image' is not set."
}

代码

models\Image.php

<?php
namespace api\modules\v1\models;

use yii\base\Model;
use yii\web\UploadedFile;

class Image extends Model
{
    /**
     * @var UploadedFile
     */
    public $image;

    public function rules()
    {
        return [
            [['image'], 'file', 'skipOnEmpty' => false, 'extensions' => 'png, jpg'],
        ];
    }

    public function upload()
    {
        $path = dirname(dirname(__FILE__)) . '/temp/';
        if ($this->validate()) {
            $this->image->saveAs($path . $this->image->baseName . '.' . $this->image->extension);
            return true;
        } else {
            die(var_dump($this->errors));
            return false;
        }
    }
}

controllers\DefaultController.php

<?php
namespace api\modules\v1\controllers;

use api\modules\v1\models\Image;
use yii\web\Controller;
use yii\web\UploadedFile;
use Yii;

class DefaultController extends Controller
{
    public $enableCsrfValidation = false;

    public function actionIndex()
    {
        Yii::$app->response->format = \yii\web\Response::FORMAT_JSON;

        $model = new Image();

        if (Yii::$app->request->isPost) {
            if($model->load(Yii::$app->request->post()))
            {
                $model->image = UploadedFile::getInstance($model, 'image');
                if ($model->upload()) {
                    // file is uploaded successfully
                    return ['success' => true, 'message' => 'File saved.'];
                }
                else return ['success' => false, 'message' => 'Could not save file.'];
            }
            else return ['success' => false, 'message' => 'Required parameter \'image\' is not set.'];
        }
        else return ['success' => false, 'message' => 'Not a POST request.'];
    }
}

邮递员

推荐答案

您的问题似乎是您用于发送图像文件的名称.通常 Yii2 使用诸如ModelName[attributeName]"之类的表单属性名称，并且您正在发送名为image"的图像文件

Your problem seems to be the name you are using to send the image file. Usually Yii2 uses names for form attributes like "ModelName[attributeName]" and you are sending your image file with the name "image"

有两种方法可以解决这个问题:

There are 2 ways of fixing this:

1. 更改用于发送图像文件的名称以遵循相同的命名约定.但是，您似乎并不想要那样.
2. 使用 getInstanceByName('image') 方法代替 getInstance($model, 'image')

1. Change the name you use to send your image file to follow the same naming conveniton. However you don't seem to want that.
2. Use getInstanceByName('image') method instead of getInstance($model, 'image')

这篇关于Yii2 POST 图像在没有 Yii2 命名约定的情况下在 API 中建模的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！