[web-devel] [Yesod][Persistent] FooIdEq,FooIdIn
sonoflilit at gmail.com
Sun Mar 13 21:48:49 CET 2011
Hello Michael and everyone,
I think that it is very repetitive to need to specify what actions can
or cannot be done on every field.
I think it would better be made part of the FieldType, at least
letting you specify defaults that can be edited in the field
Also, I definitely see a need for FooIdEq as I'm toying with adding
support for more complicated SQL right now.
What I have working in a toy hacked environment:
> showQuery $ do
> selectAll (undefined :: Pet) -- hopefully I'll make it possible to select specific fields
> where_ PetTypeEq Dog -- eventually I'll probably get "PetType .== Dog" to work
> where_ PetOwner PersonAgeLt 12
"SELECT * FROM Pet WHERE Pet.type=? AND Person.age<? AND
Pet.id=Person.id JOIN Person"
I'm currently modifying the TH to support generating
> persistFilterToJoins :: Filter val -> [(SomePersistEntity, SomePersistEntity)]
That I need in order to do this in more than a toy environment.
When there'll be something half worth showing, I'll upload to git and
invite everyone to help (since this is mostly over-my-head Haskell...
I've been learning a lot from it).
On Sat, Mar 12, 2011 at 8:46 PM, Michael Snoyman <michael at snoyman.com> wrote:
> On Sat, Mar 12, 2011 at 3:07 AM, Katsutoshi Itoh <cutsea110 at gmail.com> wrote:
>> I had often wanted FooIdIn, FooIdEq on Foo Persistent type.
>> Would you support this by default?
>> from japan.
> As Max said, glad to see that you're safe.
> For FooIdEq: I don't think there is any need, since it can be
> expressed more succinctly with the "get" function. As for FooIdIn:
> this *was* a recently requested feature. Maybe we can get it in for
> the next release. I think it would make sense to add the In attribute
> to the entity itself, eg:
> mkPersist [$persist|
> Person In
> name String
> age Int
> Any objections?
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