molszewski · August 29, 2015 13:57
diff --git a/multiple_checkboxes.py b/multiple_checkboxes.py
 #!venv/bin/python

 # Requirements:
 # - virtualenv in venv dir (virtualenv venv)
 # - Flask: venv/bin/pip install flask
 # - formencode: venv/bin/pip install formencode
 # - FormEncode-Jinja2: venv/bin/pip install FormEncode-Jinja2

 from flask import render_template_string, flash, redirect, request
 from formencode import Invalid, variabledecode, Schema, ForEach, NoDefault
 from formencode.validators import Int
 from flask import Flask
 import formencode_jinja2



 ##############################################################
 # App configuration

 app = Flask(__name__)
 app.jinja_env.add_extension(formencode_jinja2.formfill)
 app.config.update(
    DEBUG=True,
    SECRET_KEY='so key much secret'
 )


 ##############################################################
 # Validation schemas


 class YourOptions(Schema):
    your_options = ForEach(Int(not_empty=True, strip=True),
                           if_missing=NoDefault,
                           not_empty=True,
                           messages={
                               "missing": "Error - you didn't select any option"
                           })


 ##############################################################
 # Template

 YOUR_CHOICE_TEMPLATE = '''
 <html>
 <head>
    <title>Select your options</title>
 </head>
 <body>
 <h1>Select your favourite numbers</h1>
 <form action="" method="post">
    <p>
        {%- formfill form_data with errors -%}

        {% for option in [100, 200, 300] %}
            <input id="your_options_{{ loop.index }}" name="your_options-{{ loop.index }}" value="{{ option }}" type="checkbox"> {{ option }}<br />
        {% endfor %}

        {%- endformfill -%}
    </p>
    <p><input type="submit" value="Submit"></p>
 </form>
 </body>
 </html>
 '''

 INDEX_TEMPLATE = '''
 <html>
 <head>
    <title>Multiple choice example</title>
 </head>
 <body>
 {% with messages = get_flashed_messages() %}
 {% if messages %}
 <p>You selected following:</p>
 <ul>
    {% for message in messages %}
    <li>{{ message }} </li>
    {% endfor %}
 </ul>
 {% endif %}
 {% endwith %}
 <h2>Hello, please go to <a href="/your_options">a multiple choice page</a></h2>

 </body>
 </html>
 '''

 ##############################################################
 # App routes


 @app.route('/')
 @app.route('/index')
 def index():
    return render_template_string(INDEX_TEMPLATE)


 @app.route('/your_options', methods=['GET'])
 def schema_get():
    return render_template_string(YOUR_CHOICE_TEMPLATE, form_data={})


 @app.route('/your_options', methods=['POST'])
 def schema_post():
    form_data = request.form

    try:
        decoded = variabledecode.variable_decode(form_data)

        result = YourOptions().to_python(decoded)

        for option in result['your_options']:
            flash(str(option))

        return redirect('/index')
    except Invalid, e:
        unpacked_errors = e.unpack_errors(variabledecode.variable_encode)
        return render_template_string(YOUR_CHOICE_TEMPLATE,
                                      form_data=form_data,
                                      errors=unpacked_errors)


 ##############################################################
 # App start

 app.run(debug=True)
	#!venv/bin/python

	# Requirements:
	# - virtualenv in venv dir (virtualenv venv)
	# - Flask: venv/bin/pip install flask
	# - formencode: venv/bin/pip install formencode
	# - FormEncode-Jinja2: venv/bin/pip install FormEncode-Jinja2

	from flask import render_template_string, flash, redirect, request
	from formencode import Invalid, variabledecode, Schema, ForEach, NoDefault
	from formencode.validators import Int
	from flask import Flask
	import formencode_jinja2



	##############################################################
	# App configuration

	app = Flask(__name__)
	app.jinja_env.add_extension(formencode_jinja2.formfill)
	app.config.update(
	DEBUG=True,
	SECRET_KEY='so key much secret'
	)


	##############################################################
	# Validation schemas


	class YourOptions(Schema):
	your_options = ForEach(Int(not_empty=True, strip=True),
	if_missing=NoDefault,
	not_empty=True,
	messages={
	"missing": "Error - you didn't select any option"
	})


	##############################################################
	# Template

	YOUR_CHOICE_TEMPLATE = '''
	<html>
	<head>
	<title>Select your options</title>
	</head>
	<body>
	<h1>Select your favourite numbers</h1>
	<form action="" method="post">
	<p>
	{%- formfill form_data with errors -%}

	{% for option in [100, 200, 300] %}
	<input id="your_options_{{ loop.index }}" name="your_options-{{ loop.index }}" value="{{ option }}" type="checkbox"> {{ option }}<br />
	{% endfor %}

	{%- endformfill -%}
	</p>
	<p><input type="submit" value="Submit"></p>
	</form>
	</body>
	</html>
	'''

	INDEX_TEMPLATE = '''
	<html>
	<head>
	<title>Multiple choice example</title>
	</head>
	<body>
	{% with messages = get_flashed_messages() %}
	{% if messages %}
	<p>You selected following:</p>
	<ul>
	{% for message in messages %}
	<li>{{ message }} </li>
	{% endfor %}
	</ul>
	{% endif %}
	{% endwith %}
	<h2>Hello, please go to <a href="/your_options">a multiple choice page</a></h2>

	</body>
	</html>
	'''

	##############################################################
	# App routes


	@app.route('/')
	@app.route('/index')
	def index():
	return render_template_string(INDEX_TEMPLATE)


	@app.route('/your_options', methods=['GET'])
	def schema_get():
	return render_template_string(YOUR_CHOICE_TEMPLATE, form_data={})


	@app.route('/your_options', methods=['POST'])
	def schema_post():
	form_data = request.form

	try:
	decoded = variabledecode.variable_decode(form_data)

	result = YourOptions().to_python(decoded)

	for option in result['your_options']:
	flash(str(option))

	return redirect('/index')
	except Invalid, e:
	unpacked_errors = e.unpack_errors(variabledecode.variable_encode)
	return render_template_string(YOUR_CHOICE_TEMPLATE,
	form_data=form_data,
	errors=unpacked_errors)


	##############################################################
	# App start

	app.run(debug=True)