Flask route passing with parameter returning error

Question

I'm new to Flask. I have a problem with my code. I want my app to delete a specified file in my directory.

First, this is my code for showing all file in a specified directory in the form of a list:

@app.route('/dirfile')
   def dirfile():
       path = './static/pickle/'
       lst = os.listdir(path)
       return render_template('dirfile.html', lst=lst)

Here's my dirfile.html code showing all files in directory.

 {% for file_name in lst %}
    <ul class="list-group ">
      <li class="list-group-item ">
        <div class="row">
          <div class="col">
            {{ file_name }}
          </div>
          <div class="col">
            <a
              href="{{ url_for('deldir/{{file_name}}') }}"
              class="btn btn-danger btn-sm float-right"
              >Delete</a
            >
          </div>
        </div>
      </li>
    </ul>
  {% endfor %}

If you notice, I added a delete button to perform deletion in a specified file in the list.

My delete function:

@app.route('/deldir/<string:file_name>')
   def deldir(file_name):
       path = './static/pickle/'
       base = file_name
       fullpath = path + base
       os.remove(fullpath)
       return redirect(url_for('dirfile'))

But it returned the following error:

werkzeug.routing.BuildError: Could not build url for endpoint 'deldir/{{file_name}}'. Did you mean 'dirfile' instead?

furas · Accepted Answer · 2019-05-04 23:18:44Z

1

url_for() needs name of function, not url in route().

Your function has name deldir and it has parameter with name file_name so you have

 url_for('deldir', file_name=file_name)

answered May 4, 2019 at 23:18

furas

149k12 gold badges121 silver badges171 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Adiansyah Over a year ago

thank, it solved my problem. just know url_for can pass paramater too

Collectives™ on Stack Overflow

Flask route passing with parameter returning error

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related