[英]How I can send data from Flask to JavaScript?
Hello I am new and building an application in Flask and Javascript.您好,我是新手,正在 Flask 和 Javascript 中构建应用程序。 I have a problem with sending data from Flask do JavaScript.我从 Flask 和 JavaScript 发送数据时遇到问题。
I have code in routes.py我在 routes.py 中有代码
@app.route('/mapaa',methods=['GET','POST'])
def mapa():
user_id = current_user.get_id()
slownik = {}
if 'event_form' in request.form:
name = request.form['name_event']
all_data = Event.query.filter_by(name=name).all()
for row in all_data:
date_st_string = str(row.date_start)
date_end_string = str(row.date_end)
slownik = {'id':row.id,'date_st':date_st_string,'date_end':date_end_string,'type':row.type,'name':row.name,'len_route':row.len_route,'route':row.route}
return jsonify(slownik)
return render_template('mapaa.html', title='Mapa')
I want to send jsonify(slownik)
to my code in JavaScript but I dont want to do it with render_template
bacause it refresh a page and I need this data to display it on the map using JavaScript.我想在jsonify(slownik)
发送到我的代码,但我不想使用render_template
执行此操作,因为它会刷新页面,我需要使用此数据在 map 上显示它I tried return jsonify(slownik)
but it return me the data on new page.我尝试return jsonify(slownik)
但它返回了新页面上的数据。 How I can send the data when the user click event_form
button to JavaScript without refreshing page?当用户单击event_form
按钮到 JavaScript 而不刷新页面时,如何发送数据?
You can use ajax for sending post request without refreshing the page.您可以使用 ajax 发送 post 请求而无需刷新页面。 Note- include jquery before this注意 - 在此之前包括 jquery
<script src="https://code.jquery.com/jquery-3.1.0.js" ></script>
javascript code javascript码
$("#id_of_btn").click(function () { // make ajax request on btn click
$.ajax({
type: "POST",
url: "/mapaa", // url to the function
data: {
name: $("#id_of_input_tag").val(), // value of the form
},
success: function (response) {
console.log(response); // response contains the json
},
});
});
make sure you don't use form tag.确保您不使用表单标签。
Edit: If you want to send more data via forms, you could use编辑:如果您想通过 forms 发送更多数据,您可以使用
data: $('form').serialize()
this will take the name attribute of input tag and add it in the request.data So if you have this这将获取输入标签的名称属性并将其添加到 request.data 所以如果你有这个
<input type="text" id="element_id" name="username" >
You can use the value of name attribute like this request.data['username']
follow this tutorial您可以使用 name 属性的值,例如request.data['username']
遵循本教程
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