question about "build.target_set"

question about "build.target_set"

[Reyna, David]

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Hi all,

This is perhaps a dumb question, but where is "target_set" defined, as per "build.target_set" as used in "basebuildpage.html"?

It is not an explicit method of the Build class, I do not find it defined in the models nor views, and google does not obviously find it as a built-in helper method in Python nor Django, unless it is buried somewhere. Maybe I am just not grep'ing correctly?

- David



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Re: question about "build.target_set"

[Lerner, Dave]

See https://docs.djangoproject.com/en/1.5/topics/db/queries/#backwards-related-objects

" 
Following relationships "backward"
----------------------------------
If a model has a ForeignKey, instances of the foreign-key model will have access to a Manager that returns all instances of the first model. By default, this Manager is named FOO_set, where FOO is the source model name, lowercased. This Manager returns QuerySets, which can be filtered and manipulated as described in the "Retrieving objects" section above.
"

and https://docs.djangoproject.com/en/1.5/topics/db/queries/#field-lookups-intro

" Django also creates API accessors for the "other" side of the relationship - the link from the related model to the model that defines the relationship. For example, a Blog object b has access to a list of all related Entry objects via the entry_set attribute: b.entry_set.all()"


So for B=build.objects.get(id=1)
b.target_set.all() returns all targets related to the build object b.


-dave

> -----Original Message-----
> From: toaster-bounces@yoctoproject.org [mailto:toaster-bounces@yoctoproject.org] On
> Behalf Of Reyna, David
> Sent: Friday, March 21, 2014 8:29 AM
> To: toaster@yoctoproject.org
> Subject: [Toaster] question about "build.target_set"
> 
> Hi all,
> 
> This is perhaps a dumb question, but where is "target_set" defined, as per
> "build.target_set" as used in "basebuildpage.html"?
> 
> It is not an explicit method of the Build class, I do not find it defined in the models
> nor views, and google does not obviously find it as a built-in helper method in Python
> nor Django, unless it is buried somewhere. Maybe I am just not grep'ing correctly?
> 
> - David
> 
> 

Re: question about "build.target_set"

[Damian, Alexandru]

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Just a note, if you have a 'related_name' defined for the
ForeignKey(Object) field, the "object_set" magic name is replaced with the
value of the 'related_name' parameter.

Cheers,
Alex


On Fri, Mar 21, 2014 at 3:38 PM, Lerner, Dave <dave.lerner@windriver.com>wrote:

> See
> https://docs.djangoproject.com/en/1.5/topics/db/queries/#backwards-related-objects
>
> "
> Following relationships "backward"
> ----------------------------------
> If a model has a ForeignKey, instances of the foreign-key model will have
> access to a Manager that returns all instances of the first model. By
> default, this Manager is named FOO_set, where FOO is the source model name,
> lowercased. This Manager returns QuerySets, which can be filtered and
> manipulated as described in the "Retrieving objects" section above.
> "
>
> and
> https://docs.djangoproject.com/en/1.5/topics/db/queries/#field-lookups-intro
>
> " Django also creates API accessors for the "other" side of the
> relationship - the link from the related model to the model that defines
> the relationship. For example, a Blog object b has access to a list of all
> related Entry objects via the entry_set attribute: b.entry_set.all()"
>
>
> So for B=build.objects.get(id=1)
> b.target_set.all() returns all targets related to the build object b.
>
>
> -dave
>
> > -----Original Message-----
> > From: toaster-bounces@yoctoproject.org [mailto:
> toaster-bounces@yoctoproject.org] On
> > Behalf Of Reyna, David
> > Sent: Friday, March 21, 2014 8:29 AM
> > To: toaster@yoctoproject.org
> > Subject: [Toaster] question about "build.target_set"
> >
> > Hi all,
> >
> > This is perhaps a dumb question, but where is "target_set" defined, as
> per
> > "build.target_set" as used in "basebuildpage.html"?
> >
> > It is not an explicit method of the Build class, I do not find it
> defined in the models
> > nor views, and google does not obviously find it as a built-in helper
> method in Python
> > nor Django, unless it is buried somewhere. Maybe I am just not grep'ing
> correctly?
> >
> > - David
> >
> >
> --
> _______________________________________________
> toaster mailing list
> toaster@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/toaster
>



-- 
Alex Damian
Yocto Project
SSG / OTC

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