Question

我无法上传文件。按保存。然后消息错误“错误请求（＃400）缺少必需参数：id”。

我曾尝试做过$ model-＆gt;保存（假）;但是当我这样做时，只上传文字，而不上传图片。

文件后端\ views \ album \ _form.php

<?= $form->field($model, 'file')->widget(FileInput::classname(), [
    'options' => ['accept' => 'image/*'],
    'pluginOptions' => [
        'initialPreview'=>[],
        'allowedFileExtensions'=>['jpg', 'png','gif'],
        'showPreview' => true,
        'showRemove' => true,
        'showUpload' => false
     ]
   ]); ?>

文件后端\ models \ Album.php

  public static function tableName()
    {
        return 'album';
    }

    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            [['album_name', 'album_detail', 'album_cover', 'album_create', 'album_status'], 'required'],
            [['album_create'], 'safe'],
            [['album_status'], 'string'],
            [['file'],'file'],
            [['album_name', 'album_cover'], 'string', 'max' => 100],
            [['album_detail'], 'string', 'max' => 255],
        ];
    }

文件后端\ controllers \ AlbumController.php

public function actionCreate()
    {
        $model = new Album();

        if ($model->load(Yii::$app->request->post()))
        {
            // get the instance of the uploaded file
            $imageName = $model->album_name;
            $model->file = UploadedFile::getInstance($model,'file');
            $model->file->saveAs( 'uploads/'.$imageName.'.'.$model->file->extension );

            // save the path in the db column
            $model->album_cover =  'uploads/'.$imageName.'.'.$model->file->extension;
            $model->save();

            return $this->redirect(['view', 'id' => $model->id]);
        } else {
            return $this->render('create', [
                'model' => $model,
            ]);
        }
    }

Answer 1

在import pygame import random import time BLACK = (0, 0, 0) WHITE = (255, 255, 255) GREEN = (0, 255, 0) segment_width = 16 segment_height = 16 segment_margin = 4 x_change = segment_width + segment_margin y_change = 0 class Segment(pygame.sprite.Sprite): def __init__(self, x, y): super().__init__() self.image = pygame.Surface([segment_width, segment_height]) self.image.fill(WHITE) self.rect = self.image.get_rect() self.rect.x = x self.rect.y = y def draw(self, screen): screen_rect = screen.get_rect() screen.blit(self.image, self.rect) if self.rect.left < screen_rect.left: temp_rect = self.rect.copy() temp_rect.x += screen_rect.width screen.blit(self.image, temp_rect) elif self.rect.right > screen_rect.right: temp_rect = self.rect.copy() temp_rect.x -= screen_rect.width screen.blit(self.image, temp_rect) if self.rect.top < screen_rect.top: temp_rect = self.rect.copy() temp_rect.y += screen_rect.height screen.blit(self.image, temp_rect) elif self.rect.bottom > screen_rect.bottom: temp_rect = self.rect.copy() temp_rect.y -= screen_rect.height screen.blit(self.image, temp_rect) pygame.init() screen = pygame.display.set_mode((800, 600)) screen_rect = screen.get_rect() pygame.display.set_caption('Snakes') allspriteslist = pygame.sprite.Group() snake_segments = [] for i in range(3): x = 400 - (segment_width + segment_margin) * 1 y = 200 segment = Segment(x, y) snake_segments.append(segment) allspriteslist.add(segment) apple_segments = [] for i in range(1): x = 200 - (segment_width + segment_margin) * 1 y = 100 segment = Segment(x, y) apple_segments.append(segment) allspriteslist.add(segment) clock = pygame.time.Clock() done = False while not done: for event in pygame.event.get(): if event.type == pygame.QUIT: done = True if event.type == pygame.KEYDOWN: if event.key == pygame.K_LEFT: x_change = (segment_width + segment_margin) * -1 y_change = 0 if event.key == pygame.K_RIGHT: x_change = (segment_width + segment_margin) y_change = 0 if event.key == pygame.K_UP: x_change = 0 y_change = (segment_height + segment_margin) * -1 if event.key == pygame.K_DOWN: x_change = 0 y_change = (segment_height + segment_margin) old_segment = snake_segments.pop() allspriteslist.remove(old_segment) x = snake_segments[0].rect.x + x_change y = snake_segments[0].rect.y + y_change if x < screen_rect.left: x += screen_rect.width elif x + segment_width + segment_margin > screen_rect.right: x -= screen_rect.width if y < screen_rect.top: y += screen_rect.height elif y + segment_height + segment_margin > screen_rect.bottom: y -= screen_rect.height segment = Segment(x, y) snake_segments.insert(0, segment) allspriteslist.add(segment) screen.fill(BLACK) # allspriteslist.draw(screen) for x in allspriteslist: x.draw(screen) pygame.display.flip() clock.tick(5) pygame.quit()中，您没有检查actionCreate()是否成功。添加：

save()

从以下位置删除if($model->save()) { return $this->redirect(['view', 'id' => $model->id]); }声明：

else

离开：

 else {
        return $this->render('create', [
            'model' => $model,
        ]);
    }

可能你的模型没有保存，正如你所说的那样运行它return $this->render('create', [ 'model' => $model, ]);保存它而不进行任何验证。尝试在$model->save(false)或$model->save()后以最简单的方式调试为什么不能保存：

$model->validate()

Yii2上传|错误请求（＃400）缺少必需参数：id

1 个答案: