I am new to wtforms, so I`ll really appreciate any help.
I need to display books names and near each put "Delete" button. I`ve read wtforms crash course but I have no idea how to solve my problem with it.
So I decided to do it other way - my best idea is to render to template a dict with id and name and on submit return id, but I still can`t do it. Code examples are below.
It`s view.py
@application.route('/delete', methods=['GET', 'POST'])
def delete():
books_lib = mydatabase.get_all_books()
form = DeleteForm(request.form)
if request.method == 'POST':
delete_id = form.id.data
mydatabase.del_book(delete_id)
return render_template('delete.html', form = form, books_lib = books_lib)
return render_template('delete.html', form = form, books_lib = books_lib)
It`s template
<!DOCTYPE html>
<html>
<body>
<h2>book to delete</h2>
<form action="/delete" name="delete" method="POST">
{% if books_lib %}
{% for id, book in books_lib.items() %}
<p>{{book}}:<input type="submit" value="Delete" id="{{id}}">
{% endfor%}
{% endif %}
</form>
</body>
</html>
It`s form
class DeleteForm(Form):
book = TextField("Book name", [validators.Length(min=2, max=25)])
id = HiddenField("id")
Here is how I do it.
TEMPLATE
<p><a href="{{ url_for('delete_post', url=post.url) }}">delete</a></p>
View
# delete a post
@app.route('/<path:url>/d')
@login_required
def delete_post(url):
post = Post.get_post(url)
if post is None:
flash('post not found')
return redirect(url_for('home'))
db.session.delete(post)
db.session.commit()
Topic.update_counts()
flash('Your post has been deleted')
return redirect(url_for('index'))
the url_for is a Flask function that generates a url and binds it to a function.
Soooo.... in a nutshell.
to answer your original question....
if you simply want to pass a list of ids to your template....
First, create the display function.
@app.route('/index')
def index():
posts = Post.query.order_by(Post.pub_date.desc()) #SQLAlchemy query.
return render_template('index.html', posts=posts) #sends all posts to template.
Now in your template you can generate a list of post.ids.
{% for post in posts %}
{{post.id})
{% endfor %}
to add a delete link next to each item in your list use url_for.
{% for post in posts %}
<p>{{post.id}) <a href="{{ url_for('delete_post', id=post.id) }}">delete</a></p>
{% endfor %}
In this case I use post id instead of the post.url to identify the specific post I want to delete, so don't forget to modify your @app.route in your delete function.
@app.route('/<int:id>/delete')
Notice this solution does not require a form. You only need a form if your want to do bulk deletes with check boxes.
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