getlist on flask
Question
using the request.form.getlist in Flask, I only get the last value of a list. Here below the .py code and html related. If I suppress the following three lines, then I get the full list, but so doing I miss the headers of the html table rows.
<form action="{{ url_for('show_entries')}}" method=get>
<td width="50"><font size="2">{{ L }}</font></td>
</form>
What should I do ? Thanks for any hint !
from flask import Flask, render_template, request, url_for
app = Flask(__name__)
data = [
('t', 0, 'a'),
('t', 0, 'b'),
('t', 0, 'c'),
('t', 0, 'd')
]
@app.route('/', methods=['GET', 'POST'])
def show_entries():
entries=[]
for (i,v) in enumerate(data):
entries.append(data[i][2])
return render_template('layout2.html', entries=entries)
@app.route('/get', methods=['GET', 'POST'])
def get_entries():
cl1=[]
cl1=request.form.getlist('cn')
return render_template('test2.html', cl1=cl1)
if __name__ == "__main__":
app.debug = True
app.run()
The layout2.html file is:
<!DOCTYPE HTML>
<table>
{% for L in entries %}
<tr>
<form action="{{ url_for('show_entries')}}" method=get>
<td width="50"><font size="2">{{ L }}</font></td>
</form>
<form action="{{ url_for('get_entries')}}" method=post>
<td width=100 align=center><input type=text name=cn size=3 value=0.0></td>
</tr>
{% if loop.last==True %}
</table>
<br>
<div ALIGN=left>
<input type=submit value=Submit>
</form>
</div>
{% endif %}
{% endfor %}
The test2.html is:
<!DOCTYPE HTML>
<div ALIGN="center">
<td width="50"><font size="2" face="verdana" color="red">OUTPUT=</font></td>
<form action="{{ url_for('get_entries')}}" method=get></form>
<td width="50"><font size="2" face="verdana" color="red">{{ cl1 }}</font></td>
</div>
2 answers
solution1
3 2013-01-05 14:14:11
The only direct descendants that a <tr> element can have are <td> and <th> elements. You can't have a <form> element in there.
Put your <form> tag inside of the <td> and it should work:
<td width="50">
<form action="{{ url_for('show_entries')}}" method=get>
<font size="2">{{ L }}</font>
</form>
</td>
Also, your HTML is outdated:
The
<font>tag is deprecated.Similarly, the
alignattribute is also deprecated.
Style things with CSS.
solution2
2 ACCPTED 2013-01-06 03:40:39
You are opening multiple form elements but only closing one of them - this is probably causing the browser to only send over the last form - and hence only one value is being sent over. Wrap your form around the entire table instead (and remove the nested form) and getlist will work.
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