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How to implement setters on Ecto models (or Elixir structs)


How to implement setters on Ecto models (or Elixir structs)

By : user2957021
Date : November 22 2020, 03:03 PM
I wish this helpful for you Currently, there is no mechanism. The best you can do is to create a function like:
code :
User.normalize(%User{}, conn.params["user"])


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Elixir/Phoenix: How to do unit tests for models without using Ecto?

Elixir/Phoenix: How to do unit tests for models without using Ecto?


By : shanto
Date : March 29 2020, 07:55 AM
To fix this issue Short answer: instead of use App.ModelCase just use use ExUnit.Case.
Long answer. When creating project with Ecto you get three different test case templates located in test/support:
code :
using do
  quote do
    alias App.Repo

    import Ecto
    import Ecto.Changeset
    import Ecto.Query, only: [from: 1, from: 2]
    import App.ModelCase
  end
end

setup tags do
  unless tags[:async] do
    Ecto.Adapters.SQL.restart_test_transaction(App.Repo, [])
  end

  :ok
end

def errors_on(model, data) do
  model.__struct__.changeset(model, data).errors
end
Elixir Ecto: Could someone give an example of Ecto.Multi.run/5

Elixir Ecto: Could someone give an example of Ecto.Multi.run/5


By : ramakrishna kotagude
Date : March 29 2020, 07:55 AM
should help you out I'm assuming you want value to be the "changes so far" and other_value is a value you're specifying when calling Multi.run/5. In that case, if your function is in a module named Foo:
code :
defmodule Foo do
  def some_fun(value, other_value) do
    case value do
      nil -> {:error, other_value}
      _ -> {:ok, other_value}
    end
  end
end
Multi.run(multi, name, Foo, :some_fun, [other_value])
Multi.run(multi, name, fn value -> Foo.some_fun(value, other_value) end)
Elixir- Cannot save Ecto.DateTime into Postgres database, where saving Ecto.Date works

Elixir- Cannot save Ecto.DateTime into Postgres database, where saving Ecto.Date works


By : Aaron
Date : March 29 2020, 07:55 AM
Any of those help If Ecto.Date works the type of the field in your database is probably date instead of utc_datetime (timestamp in PostgreSQL). Changing it to utc_datetime should fix the error. If you used migrations to create the table, you can create a new one which alters the type of the column like this:
code :
def up do
  alter table(:sessions) do
    modify :expires, :utc_datetime
  end
end

def down do
  alter table(:sessions) do
    modify :expires, :date # old type here
  end
end
elixir UTC date time casting in ecto models and params

elixir UTC date time casting in ecto models and params


By : Sickpanada
Date : March 29 2020, 07:55 AM
This might help you There was a bug in old ecto version or this was not handled in ecto 2.1.6 dont know exactly. But I got it fixed by upgrading ecto to latest version and passing config :app, App.Repo, migration_primary_key: [type: :serial], to my database config options. (Because upgrading without setting primary key types updates all of the integer serial keys to big integer and I had to update a lot of functions and triggers this way)
Elixir Ecto 2: Self-referencing many_to_many and Ecto.Changeset.put_assoc. How?

Elixir Ecto 2: Self-referencing many_to_many and Ecto.Changeset.put_assoc. How?


By : briandweber
Date : March 29 2020, 07:55 AM
will be helpful for those in need I couldn't reproduce the problem with my own associations. I have a feeling you might at some point be working with %MyApp.Contact{} instead of %MyApp.User{}? Can you check that and report back?
Something that I did notice (but would not produce this error): you are trying to put MyApp.User changesets into the :contacts association, which requires MyApp.Contact changesets.
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