Hi,
if this is from voyage, then is a complicated query, because it is storing a
reference to a second root.
Let’s say you have an object a1 who is an instance of A and an object b1 who is
an instance of B.
b := B new.
a := A new
data1: 42;
data2: ‘something’;
refB: b.
which means what you want, in plain Pharo would be something like this:
aCollectionOfA select: [ :each | each refB = b ].
but since you want to use Voyage, I guess you want to execute the query *in
mongo* (to avoid loading all instances of A into memory).
So, in voyage you need to do it in some hack way:
B selectOne: [ :each | … ].
A selectMany: [ :each | (each at: ‘refB.__id’) = b voyageId ].
this will solve your problem, I guess.
Esteban
ps: this is hacky because what in general you do with this kind of structures
is to keep a list of A in B, along with your list of B in A (that means, you
define a many-to-many relationship)
> On 22 Nov 2016, at 11:42, Asbath Sama biyalou via Pharo-users
> <pharo-users@lists.pharo.org> wrote:
>
>
> From: Asbath Sama biyalou <asamabiya...@yahoo.com>
> Subject: Rest Services with pharo objects as parameters
> Date: 22 November 2016 at 11:42:25 GMT+1
> To: Pharo users users <pharo-users@lists.pharo.org>
>
>
> Hello Everybody.
>
> I have two classes ClassA(data1 data2 ref_ClassB) ClassB (data3 data4).
>
> I want to get list of classA where ref_ClassB = ClassB. I don't know how
> to do my url in order
>
> to sent ClassB as a parameter of the service. I am using Pharo 4.0 with
> Voyage-Mongo.
>
>
>
>
