Actually, it was really easy. As in "four lines" easy. I haven't done
extensive testing with it, but a quick run through seems to demonstrate
that it does what I want it to do.
Best of all, you only have to modify one file -- core/meta/fields.py:
1) Add a new param "length=None" to the __init__ declaration for the
base Field class, around lines 105-111
2) in the __init__ method, add a line to use the new param:
"self.length = length" (I added this right after the line that grabs
the maxlength param, cause it made sense to me there)
3) tweak the get_manipulator_fields method around line 230 to make use
of the new "self.length" attribute. Add the following lines (with
corrected indenting, of course):
if self.length:
params['length'] = self.length
You should end up with something like:
if self.maxlength and not self.choices:
params['maxlength'] = self.maxlength
if self.length:
params['length'] = self.length
That's it. Now you can use a "length" param in your model
declarations, like:
class Poll(meta.Model):
question = meta.CharField(maxlength=200, length=4)
The result is what you'd expect: the resulting HTML form field used in
the admin interface has its "size" attribute set to "4".
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