CODEWITHSUNDEEP
htmlpython-2.7flask
D3l_Gato
D3l_Gato

Reputation: 1329

Remembering selected dropdown values Python/Flask

            <option value="1" {{ selected }}>1</option>
            <option value="2" {{ selected }}>2</option>
            <option value="3" {{ selected }}>3</option>
            <option value="4" {{ selected }}>4</option>

I have a flask app with a handful of dropdown menus. I want to pass the selected value when a user submits the form so they see their previous selection on the next page.

Could someone provide a simple example of this? I just cant conceptualize how to accomplish this.

Thanks

Upvotes: 4

Views: 4230

Answers (1)

abigperson
abigperson

Reputation: 5372

Python Flask view

@app.route('/form/')
def form():
    # list of tuples representing select options
    choices = [(str(x), str(x)) for x in range(1, 20)]
    # test if value was passed in (e.g. GET method), default value is 1
    selected = request.args.get('choice', '1')
    # application 'state' variable with default value and test
    state = {'choice': selected}
    return render_template('view_form.html', choices=choices, state=state)

Within Jinja template:

{% for row in choices %}
<option value="{{ row[0] }}"{% if row[0] == state.choice %} selected{% endif %}>{{ row[1] }}</option>
{% endfor %}

Upvotes: 6

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