Python 从 WTForms 字段获取上传的文件
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Get an uploaded file from a WTForms field
提问by Kevin Q
In the Flask docs, the file upload example uses <input type="file" name="file">then request.files['file']to get the file. I'm using a WTForms FileField. How do I get the uploaded file when using WTForms rather than writing the input html myself?
在 Flask 文档中，文件上传示例使用<input type="file" name="file">thenrequest.files['file']来获取文件。我正在使用 WTForms FileField。使用WTForms而不是自己编写输入html时如何获取上传的文件？
采纳答案by davidism
request.filesis a dictionary where the keys are the names of the file fields. You can get the name of a WTForms field with my_form.my_field.name. So you can access the data uploaded from that field with request.files[my_form.my_field.name].
request.files是一个字典，其中键是文件字段的名称。您可以使用my_form.my_field.name. 因此，您可以访问从该字段上传的数据request.files[my_form.my_field.name]。
Rather than using the WTForms FileField, you can use the Flask-WTF FileField instead. It provides a dataattribute that gets the file data for you. This is described in the documentation.
您可以使用 Flask-WTF FileField 而不是使用 WTForms FileField。它提供了一个data为您获取文件数据的属性。 这在文档中有所描述。
from flask import url_for, redirect, render_template
from flask_wtf import FlaskForm
from flask_wtf.file import FileField
from werkzeug import secure_filename
class UploadForm(FlaskForm):
file = FileField()
@app.route('/upload', methods=['GET', 'POST'])
def upload():
form = UploadForm()
if form.validate_on_submit():
filename = secure_filename(form.file.data.filename)
form.file.data.save('uploads/' + filename)
return redirect(url_for('upload'))
return render_template('upload.html', form=form)
<html>
<head>
<title>Upload</title>
</head>
<body>
<form method="post" enctype="multipart/form-data">
{{ form.hidden_tag() }}
{{ form.file }}
<input type="submit">
</form>
</body>
</html>
