How do I make a simple HTML checkbox into a bool on Google App Engine?

Question

Model Code:

class Task(db.Model):
    complete = db.BooleanProperty(default=False)

HTML Code:

<input type="checkbox" name="complete" value="True" />

Database:

task = Task()
task.complete = self.request.get('complete')
task.put()

This returns an error:

BadValueError: Property complete must be a bool

How should this be done?

Amber · Accepted Answer · 2011-02-28T05:09:17.313

5

Since unchecked checkboxes are not sent as a parameter...

task.complete = self.request.get('complete') != ''

edited Feb 28 '11 at 05:09

answered Feb 26 '11 at 02:24

Amber

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Hey I guess I just have been refreshing the page too often, but I have seen all three of your edits. All three worked for me and I appreciate your help. Care to explain why this was better than the previously two working statements? Thanks. I'm new. – CT. Feb 26 '11 at 02:34
Mostly just it's the most straightforward. All 3 are perfectly fine options. `!= ''` would also be a viable option. – Amber Feb 26 '11 at 02:44
'is not' tests for object identity. Python may make all empty strings the same object, but relying on that is probably a bad idea - I think using `!=` would be less prone to errors. :) – Nick Johnson Feb 28 '11 at 03:17
While I'm fairly sure every single serious Python interpreter out there will intern `''`, you're right that in theory it's a bad thing to rely on. Edited to `!=`. – Amber Feb 28 '11 at 05:09

score 0 · Answer 2 · edited May 23 '17 at 11:55

0

You can use the type() funktion to check the tape of self.request.get('complete') I would suggest, that self.request.get('complete') returns 'True' but as a String so you should convert it to boolean. Here is a "list" of different methods

edited May 23 '17 at 11:55

Community

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answered Feb 26 '11 at 02:21

V-Light

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How do I make a simple HTML checkbox into a bool on Google App Engine?

2 Answers2