将多个图像从angular-6上传到laravel-5.2

Question

我无法从表单上载多个图像。我在做什么：

HTML

p <- ggplot(for_plots, aes(x = factor(condition), y = conflict, fill = smoking_status)) + 
  stat_summary(aes(pattern=smoking_status),
               fun = "mean", position = "dodge", 
               geom = "bar_pattern", pattern_fill="black", colour="black") + #edited part
  theme_classic() +
  scale_fill_manual(labels = c("Smokers", "Ex"),
                    values = c("blue", "gold"), guide = "legend", (title = "Smoking status")) +
  scale_color_manual(labels = c("Smokers", "Ex"),
                     values = c("blue", "gold"), guide = "legend", (title = "Smoking status")) +
  labs(x = 'Condition', y = 'Conflict (AUC)') + 
  scale_pattern_manual(values=c("none", "stripe"))+ #edited part
  scale_x_discrete(labels = c('Animal','Smoking')) +
  coord_cartesian(ylim=c(0,1.5)) +
  scale_y_continuous(expand = c(0,0)) 

p + 
  stat_summary(fun.data = mean_se, geom = "errorbar", width = .08, position = position_dodge(0.9))

TYPESCRIPT

 <div class="image-upload-wrap">
          <input class="file-upload-input form-control" name="photos" (change)="handleAlbumPhoto($event.target.files)"  [(ngModel)]="albums.photo" type='file' accept="image/png,image/jpeg,image/heic" multiple />
        </div>

LARAVEL

handleAlbumPhoto(files : FileList) {
console.log(files);
this.album_photos = files; 
}

if(this.album_photos !== null && this.album_photos !== undefined ) {
    form.value['photos'] = this.album_photos;
}

return $request->all(); // it returns as