I have a web application that gets dynamic data from Flask when a select element from HTML is changed. of course that is done via jquery ajax. No probs here I got that.
我有一個Web應用程序，當HTML中的select元素發生更改時，它會從Flask獲取動態數據。當然這是通過jquery ajax完成的。沒有probs在這里我得到了。
The problem is, the dynamic data - that is sent by Flask -, is a list of objects from the database Flask-sqlalchemy.
問題是，Flask發送的動態數據是Flask-sqlalchemy數據庫中的對象列表。
Of course the data is sent as JSON from Flask.
當然，數據是從Flask發送的JSON。
I'd like to iterate through those objects to display their info using Jinja.
我想迭代這些對象以使用Jinja顯示它們的信息。
HTML
Option 1
Option 2
Option 3
jQuery
$('body').on('change','#mySelect',function(){
var option_id = $('#mySelect').find(':selected').attr('id');
$.ajax({
url: "{{ url_for('_get_content') }}",
type: "POST",
dataType: "json",
data: {'option_id':option_id},
success: function(data){
data = data.data;
/* HERE I WANT TO ITERATE THROUGH THE data LIST OF OBJECTS */
}
});
});
Flask
@app.route('/_get_content/')
def _get_content():
option_id = request.form['option_id']
all_options = models.Content.query.filter_by(id=option_id)
return jsonify({'data': all_options})
PS : I know that jinja gets rendered first so there is no way to assign jQuery variables to Jinja. So how exactly am I going to iterate through the data list if I can't use it in Jinja ?
2 个解决方案
#1
7
Okay, I got it.
好的，我明白了。
Simply, I made an external html file and added the required jinja template to it.
簡單地說，我制作了一個外部html文件並添加了所需的jinja模板。
{% for object in object_list %}
{{object.name}}
{% endfor %}
then in my Flask file I literally returned the render_template response to the jquery ( which contained the HTML I wanted to append )
然后在我的Flask文件中，我逐字地將render_template響應返回給jquery(其中包含我想要追加的HTML)
objects_from_db = getAllObjects()
return jsonify({'data': render_template('the_temp.html', object_list=objects_from_db)}
And then simply append the HTML from the response to the required div to be updated.
然后只需將響應中的HTML附加到要更新的所需div即可。
#2
0
If you are sending data using json you don't need to use Jinja2. You can simply try something like this:
如果您使用json發送數據，則不需要使用Jinja2。你可以嘗試這樣的事情：
@app.route('/_get_content/')
def _get_content():
option_id = request.form['option_id']
all_options = models.Content.query.filter_by(id=option_id)
return jsonify({'data': [option.name for option in all_options]})
or define a method in your model something like to_json that returns a field or dictionary or ... and call it in your view.
或者在模型中定義類似於to_json的方法，該方法返回字段或字典或...並在視圖中調用它。
@app.route('/_get_content/')
def _get_content():
option_id = request.form['option_id']
all_options = models.Content.query.filter_by(id=option_id)
return jsonify({'data': [option.to_json() for option in all_options]})