brettbeatty

brettbeatty

Ecto schema create assoc without adding to struct

Central to my app is the Account. I have a lot of schemas that belongs_to Account. I like including corresponding has_one/has_many on Account for query/build_assoc conveniences, but I don’t want to clutter the Account struct with an increasing number of non-core associations that will always be #Ecto.Association.NotLoaded<...>. Is there a way to define an association without adding it to the schema struct?

Off the top of my head the features I would most want but so far have worked around would be these:

  • join: m in assoc(a, :my_assoc)
  • Ecto.assoc(account, :my_assoc)
  • Ecto.build_assoc(account, :my_assoc)

Most Liked

fuelen

fuelen

You can hide fields you’re not interested in by defining Inspect protocol

@derive {Inspect, optional: [:my_assoc1, :my_assoc2]}

The code above will hide default #Ecto.Association.NotLoaded<...> values for :my_assoc1 and :my_assoc2 fields and will show them only if something else is set.

Where Next?

Popular in Questions Top

shahryarjb
Hello, I get Persian date from my client and convert it to normal calendar like this: def jalali_string_to_miladi_english_number(persi...
New
sergio
In Ruby, I can go: User.find_by(email: "foobar@email.com").update(email: "hello@email.com") How can I do something similar in Elixir? ...
New
vonH
In asking this question I am more interested about the expressiveness of the language itself and less concerned about the availability of...
New
yawaramin
In the Dialyzer docs ( http://erlang.org/doc/man/dialyzer.html#requesting-or-suppressing-warnings-in-source-files ), there is a way to tu...
New
lk-geimfari
What is most correct way to open, read and parse JSON file with poison? For example if we have example.json file in root of some projec...
New
stefanchrobot
What’s the safe way to decode a JSON string into a struct? I want to avoid calling String.to_atom. Jason.decode can give me a map with st...
New
Patoshizzle
After calling mix ecto.create I get this error: 17:00:32.162 [error] GenServer #PID&lt;0.412.0&gt; terminating ** (Postgrex.Error) FATAL...
New
Codball
Mix format works fine if run from the cmd. I’ve followed this to facilitate the implementation into VSC which involves downloading an ext...
New
Mooodi
Given a string, how can I get access to its character by index? Enum.at("my_string", 2) doesn't work. Or rather, not char, but a substr...
New
siddhant3030
Hi, I have to write a raw query for one of my project. But till now I have used ecto queries and don’t have much experience writing raw ...
New

Other popular topics Top

joaquinalcerro
Hi there, I am working with Ecto-Postgresql and I need to call all of the records from a specific table but the table has 40,000 record...
New
ycv005
I have followed this StackOverflow post to install the specific version of Erlang. And When I am running mix ecto.setup then getting fol...
New
Jim
As a follow up to my earlier question: I have the code compiling and running but not getting a successful login from the rest server. ...
New
hariharasudhan94
I would like to know what is the best IDE for elixir development?
New
chrismccord
As promised, the first release candidate of Phoenix 1.3.0 is out! This release focuses on code generators with improved project structure...
New
vonH
When I run the Plug and I recompile I wind up having to use Ctrl C to quit iex and start again. Witht the help of rlwrap I can use the cu...
New
belgoros
I’m not a pro in using Regex and can’t figure out why the following behaviour happens, especially if we take into account the difference ...
New
josevalim
Hi everyone, One of the features added to Elixir early on to help integration with Erlang code was the idea of overridable function defi...
New
AstonJ
by Lance Halvorsen Elixir and Phoenix are generating tremendous excitement as an unbeatable platform for building modern web application...
460 27162 124
New
jay1
Why is it that the mnesia database isn’t the most preferred database for use in Elixir/Phoenix?
New

We're in Beta

About us Mission Statement