How to use WTForms-Dynamic-fields Module (Flask/Python)










2















I guess this question can be interpreted more generally with help on how to implement custom Python Modules.



I am building a Flask Web App and trying to create a reasonably complex form that basically allows a user to add more fields on button click but still retaining the benefits of WTForms.



I have come across this module online: https://pypi.org/project/WTForms-Dynamic-Fields/



I am confused as to how I am supposed to implement the module.



It says to create an instance of the module before using the add_field() and add_validator() methods. Before then binding the form variable to the 'process()' method. I guess I am meant to include a JavaScript button but getting very confused as to how to do this.



As a simple example I am trying to implement it on this simple WTForm:



class LoginForm(FlaskForm):
username = StringField('username', validators=[InputRequired()])
password = PasswordField('password', validators=[InputRequired()])
dynamic = WTFormsDynamicFields()


The HTML form:



<form method="POST" action="url_for('form')">
form.csrf_token
render_field(form.username)
render_field(form.password)

<button onclick="dynamic.add_field('email', 'Email address', TextField)">Click Me!</button>




App.py:



@app.route('/form/', methods=['GET', 'POST'])
def form():
form = dynamic.process(LoginForm(), request.post)
if form.validate_on_submit():
return '<h1>Thanks</h1>'
return render_template("form.html", form=form)


Would someone be able to give the one-page documentation a quick scan and tell me how exactly this can be implemented. It will help me moving forward with using other modules too (relative beginner).



Thanks in advance.










share|improve this question






















  • How about this? stackoverflow.com/questions/28375565/…

    – Jessi
    Nov 15 '18 at 1:17















2















I guess this question can be interpreted more generally with help on how to implement custom Python Modules.



I am building a Flask Web App and trying to create a reasonably complex form that basically allows a user to add more fields on button click but still retaining the benefits of WTForms.



I have come across this module online: https://pypi.org/project/WTForms-Dynamic-Fields/



I am confused as to how I am supposed to implement the module.



It says to create an instance of the module before using the add_field() and add_validator() methods. Before then binding the form variable to the 'process()' method. I guess I am meant to include a JavaScript button but getting very confused as to how to do this.



As a simple example I am trying to implement it on this simple WTForm:



class LoginForm(FlaskForm):
username = StringField('username', validators=[InputRequired()])
password = PasswordField('password', validators=[InputRequired()])
dynamic = WTFormsDynamicFields()


The HTML form:



<form method="POST" action="url_for('form')">
form.csrf_token
render_field(form.username)
render_field(form.password)

<button onclick="dynamic.add_field('email', 'Email address', TextField)">Click Me!</button>




App.py:



@app.route('/form/', methods=['GET', 'POST'])
def form():
form = dynamic.process(LoginForm(), request.post)
if form.validate_on_submit():
return '<h1>Thanks</h1>'
return render_template("form.html", form=form)


Would someone be able to give the one-page documentation a quick scan and tell me how exactly this can be implemented. It will help me moving forward with using other modules too (relative beginner).



Thanks in advance.










share|improve this question






















  • How about this? stackoverflow.com/questions/28375565/…

    – Jessi
    Nov 15 '18 at 1:17













2












2








2








I guess this question can be interpreted more generally with help on how to implement custom Python Modules.



I am building a Flask Web App and trying to create a reasonably complex form that basically allows a user to add more fields on button click but still retaining the benefits of WTForms.



I have come across this module online: https://pypi.org/project/WTForms-Dynamic-Fields/



I am confused as to how I am supposed to implement the module.



It says to create an instance of the module before using the add_field() and add_validator() methods. Before then binding the form variable to the 'process()' method. I guess I am meant to include a JavaScript button but getting very confused as to how to do this.



As a simple example I am trying to implement it on this simple WTForm:



class LoginForm(FlaskForm):
username = StringField('username', validators=[InputRequired()])
password = PasswordField('password', validators=[InputRequired()])
dynamic = WTFormsDynamicFields()


The HTML form:



<form method="POST" action="url_for('form')">
form.csrf_token
render_field(form.username)
render_field(form.password)

<button onclick="dynamic.add_field('email', 'Email address', TextField)">Click Me!</button>




App.py:



@app.route('/form/', methods=['GET', 'POST'])
def form():
form = dynamic.process(LoginForm(), request.post)
if form.validate_on_submit():
return '<h1>Thanks</h1>'
return render_template("form.html", form=form)


Would someone be able to give the one-page documentation a quick scan and tell me how exactly this can be implemented. It will help me moving forward with using other modules too (relative beginner).



Thanks in advance.










share|improve this question














I guess this question can be interpreted more generally with help on how to implement custom Python Modules.



I am building a Flask Web App and trying to create a reasonably complex form that basically allows a user to add more fields on button click but still retaining the benefits of WTForms.



I have come across this module online: https://pypi.org/project/WTForms-Dynamic-Fields/



I am confused as to how I am supposed to implement the module.



It says to create an instance of the module before using the add_field() and add_validator() methods. Before then binding the form variable to the 'process()' method. I guess I am meant to include a JavaScript button but getting very confused as to how to do this.



As a simple example I am trying to implement it on this simple WTForm:



class LoginForm(FlaskForm):
username = StringField('username', validators=[InputRequired()])
password = PasswordField('password', validators=[InputRequired()])
dynamic = WTFormsDynamicFields()


The HTML form:



<form method="POST" action="url_for('form')">
form.csrf_token
render_field(form.username)
render_field(form.password)

<button onclick="dynamic.add_field('email', 'Email address', TextField)">Click Me!</button>




App.py:



@app.route('/form/', methods=['GET', 'POST'])
def form():
form = dynamic.process(LoginForm(), request.post)
if form.validate_on_submit():
return '<h1>Thanks</h1>'
return render_template("form.html", form=form)


Would someone be able to give the one-page documentation a quick scan and tell me how exactly this can be implemented. It will help me moving forward with using other modules too (relative beginner).



Thanks in advance.







python flask module flask-wtforms wtforms






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asked Nov 14 '18 at 10:25









joester110joester110

213




213












  • How about this? stackoverflow.com/questions/28375565/…

    – Jessi
    Nov 15 '18 at 1:17

















  • How about this? stackoverflow.com/questions/28375565/…

    – Jessi
    Nov 15 '18 at 1:17
















How about this? stackoverflow.com/questions/28375565/…

– Jessi
Nov 15 '18 at 1:17





How about this? stackoverflow.com/questions/28375565/…

– Jessi
Nov 15 '18 at 1:17












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