Re: dynamically assigning a field value
pinco wrote: > Hi, > > I'm trying to figure out how to solve the following issue without > succeed. > > I have a model like this: > > class Product(models.Model): >... >measure_cm = models.FloatField(...) >measure_in = models.FloatField(...) > ... > > The fields contain the same information (a relevant dimension of a > product) expressed in centimeter and in inches respectively. > > Why have two separate fields? Why not have one field - e.g. 'measure_mm' and convert to either inches or centimetres according to the user's choice? > I would able, in the view and in the template, to do something like > this: > > ... > this_product = Product.objects.get(pk=product_id) > this_product_measure = this_product.measure > > and dynamically assigning to this_product_measure the value of > this_product.measure_cm or this_product.measure_in based on a variable > stored in the session, representing a user preference. > > Actually I manage this with an "if request.session['user_preference']" > statement, but it would be nice to catch the right value on every view > without repeating the if statement. > > How can I do this? > > Thank you in advance > > > > > > > --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~--~~~~--~~--~--~---
Re: dynamically assigning a field value
On Sat, 2008-01-05 at 04:12 -0800, pinco wrote: > Hi, > > I'm trying to figure out how to solve the following issue without > succeed. > > I have a model like this: > > class Product(models.Model): >... >measure_cm = models.FloatField(...) >measure_in = models.FloatField(...) > ... > > The fields contain the same information (a relevant dimension of a > product) expressed in centimeter and in inches respectively. > > I would able, in the view and in the template, to do something like > this: > > ... > this_product = Product.objects.get(pk=product_id) > this_product_measure = this_product.measure > > and dynamically assigning to this_product_measure the value of > this_product.measure_cm or this_product.measure_in based on a variable > stored in the session, representing a user preference. For a template, you could write a context processor that puts the computed value into the template's context each time. For a view, you could write a method on the model that accepts the "user" object and returns the correct value. It doesn't even have to be a method on the model -- it could just be a separate helper function. The point is that you're going to have to pass in the user object each time anyway, since there's no way to magically read that out of thin air. Regards, Malcolm -- No one is listening until you make a mistake. http://www.pointy-stick.com/blog/ --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~--~~~~--~~--~--~---
Re: dynamically assigning a field value
Howdy pinco, Off the top of my head I don't see away to avoid the test, but you could bundle it into a method of the Product class: def get_preferred_measure(self, request): if request.session['user_preference'] == "cm": return self.measure_cm return self.measure_in --gordy --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~--~~~~--~~--~--~---
dynamically assigning a field value
Hi, I'm trying to figure out how to solve the following issue without succeed. I have a model like this: class Product(models.Model): ... measure_cm = models.FloatField(...) measure_in = models.FloatField(...) ... The fields contain the same information (a relevant dimension of a product) expressed in centimeter and in inches respectively. I would able, in the view and in the template, to do something like this: ... this_product = Product.objects.get(pk=product_id) this_product_measure = this_product.measure and dynamically assigning to this_product_measure the value of this_product.measure_cm or this_product.measure_in based on a variable stored in the session, representing a user preference. Actually I manage this with an "if request.session['user_preference']" statement, but it would be nice to catch the right value on every view without repeating the if statement. How can I do this? Thank you in advance --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~--~~~~--~~--~--~---
