nallwhy

nallwhy

I have a schema and it has many fields and one belongs_to association.
I want to query this model with one field of associated model like below.

def MyModel do
  schema "my_models" do
    field(:field0, :string)
    field(:field1, :string)
    field(:field2, :string)
    field(:field3, :string)
    field(:field4, :string)
    field(:field5, :string)
    field(:field6, :string)
    field(:field7, :string)
    field(:field8, :string)

    field(:other_model_id)
  end
end

def list() do
  MyModel
  |> join(:inner, [m], o in OtherModel, m.other_model_id == o.id)
  |> select([m, o], %{field0: m.field0, field1: m.field1, ... other_model_value: o.value})
end

But I don’t want to repeat field0, field1, …
Is there a better way to do this?

Thanks!

Showing Posts 1 to 1

nallwhy

nallwhy OP

I found a way to do it.

def MyModel do
  schema "my_models" do
    field(:field0, :string)
    ...
    field(:field8, :string)

    field(:other_model_id, :integer)

    # Add a virtual field
    field(:other_model_value, :integer, virtual: true)
  end
end

def list() do
  MyModel
  |> join(:inner, [m], o in OtherModel, m.other_model_id == o.id)
  |> select([m, o], %{m | other_model_value: o.value})
end
— All posts loaded —

Where Next? Top

Trending in Questions Top

itzmidinesh
Hi all, I’m working on a Phoenix project where I need to make external HTTP requests and I’m trying to choose between Req and HTTPoison....
New
yarrichar
I’m very new to Elixir, so sorry if this is a silly question: I am wondering what happens to the mailbox of a process when the machine i...
New
pragdave
How do I tell Hologram not to escape HTML when substituting into templates? {Textile.render(@product.long_description)} escapes the HTM...
New
Fl4m3Ph03n1x
Background When trying to execute mix release on a Windows 11 machine for a Phoenix project I get the following error: * assembling mark...
New
leoschweizer
Hi, we run different LLM models across a cluster, with each node loading a configurable subset. Model-specific queues let nodes consume ...
New
rlipscombe
I’d like to create a file with 600 permissions (rw-------), but there’s a race condition if I create it and then change the permissions. ...
New
saleyn
Is there a way to import record definitions in the iex shell for pretty printing (similar to the rr command in the erl shell)? This woul...
New

Other Trending Topics Top

dominicletz
Hey there, I haven’t seen a list of useful Elixir specific skills for the popular AI tools yet so I’m starting one here with my first. ...
New
raa-ziq
Hi everyone :waving_hand: I wanted to share something I’ve been building — NowBlind, a random chat app designed to help people discover ...
New
mudasobwa
I fully migrated to my own harness from Anthropic/Gemini and I think it’s time to share it. Welcome DSH, the DeepSeek Harness, fully writ...
New
KristerV
Hey. Is there anyone here who creates agents in their apps? Not talking about using agents, but creating them. I’m finding it pretty diff...
New
OndrejValenta
(I just needed to vent somewhere and LinkedIn is full of hope, or hype, I’m not sure which exactly) AI dream has many faces, but general...
New
kip
Localize is the next generation localisation library for Elixir. Think of it as ex_cldr version 3.0. The first version will be released ...
New

We're in Beta

About us Mission Statement

Options

Thread Display Mode




Thread Preview

Skip Thread Previews