* * @param {Object|Array} obj The object to iterate * @param {Function} fn The callback to invoke for each item */ //循环一个数组或者一个对象,为每一个元素或者属性调用function function forEach(obj, fn) { // Don't bother if no value provided if (obj === null || typeof obj =...
if (this.body instanceof HttpParams) { return 'application/x-www-form-urlencoded;charset=UTF-8'; } // Arrays, objects, and numbers will be encoded as JSON. if (typeof this.body === 'object' || typeof this.body === 'number' || Array.isArray(this.body)) { return 'application/...
在上述示例中,我们首先创建了一个FormData对象formData。然后,通过获取文件输入框的文件对象,并使用append()方法将文件添加到formData中。接着,我们将对象数组objects转换为JSON字符串,并使用append()方法将JSON字符串添加到formData中。最后,我们使用XMLHttpRequest对象发送formData到服务器。
Creating FormData Objects To create a FormData object, simply instantiate it using the FormData() constructor. You can also see everything inside a FormData instance by calling the entries method on it. The method returns a nested array, each member would contain a key and a value: async fu...
Returns an array of all the values associated with a given key from within a FormData. FormData.has() Returns whether a FormData object contains a certain key. FormData.keys() Returns an iterator iterates through all keys of the key/value pairs contained in the FormData. FormData.set() Sets...
当您调用form.save()时,它会返回模型实例,这样您就可以像这样从中获取实例 def form_valid(self, form): form.instance.user = self.request.user date_instance = form.save() photos = self.request.FILES.getlist('image') for photo in photos: Photo.objects.create(date=date_instance, image=photo) ...
{(ArrayBufferLike | ArrayBufferView | File | Blob | string)[]} fileBits – An Array strings, or ArrayBuffer, ArrayBufferView, Blob objects, or a mix of any of such objects, that will be put inside the File; {string} filename – Representing the file name. {object} [options = {}] ...
I really wanna thank you for this solution, and I wanna Ask you please, what if I have an array of objects called Questions that has another array of objects called choices what should I do then so I can send my data to the controller ? like this: questions:[ { question_text: null...
在Excel中截图，常用的方法包括在Excel中复制为图片、使用第三方截屏工具、使用键盘PrintScreen按钮等方法。
{(ArrayBufferLike | ArrayBufferView | File | Blob | string)[]}fileBits – AnArraystrings, orArrayBuffer,ArrayBufferView,Blobobjects, or a mix of any of such objects, that will be put inside theFile; {string}filename – Representing the file name. ...