Lets say I have map like this fetching from my database %{"_id" => #BSON.ObjectId<58eb1a7a9ad169198c3dXXXX>, "email" => "XXXX@gmail.com", "name" => "Hariharasudhan", "password_hash" => "XXXX", "phone" => "XXXX"} and i have struct like follow > @primary_key{:id, :binary_id, autogene…

I use this code. lib/mappable.ex master def to_map(nil) do nil end @default_options [ keys: :atoms, shallow: false, skip_unknown_atoms: false, warn_unknown_atom…

Keys from the map must be atoms, as only atoms are allowed in struct definition.

@matteosister yes, but map returned from db has string keys, Is there is any way to conevrt??

Wow, I’m pretty surprised that this isn’t built in, or at least available as part of Phoenix since incoming json data is not exactly an unexpected occurence in that context. Sure, it’s simple to manually add, and I understand the point about using strings instead of atoms for external data. Still, f…

Poison let’s you do this ergonomically: Poison.decode!(~s({"name": "Devin Torres", "age": 27}), as: %Person{})

Many thanks! :folded_hands:t2: I knew I was missing something.

Ah, as it turns out that won’t work for my purposes. I’m not trying to grab the values from a literal and when if I use inspect to get a string dump of the map, it’s obviously not going to come out as proper JSON. Ah well. I’ll write a clever macro at some point, I reckon.

Untested, but it seems like cast and apply_changes should do what you want: %User{} |> Ecto.Changeset.cast(map, User.__schema__(:fields)) |> Ecto.Changeset.apply_changes()

I cannot figure it out which solution is better, the one presented or the one José Valim created? Seems they are doing slightly different things.

Or you could use the Morphix library.

This decode as stuff is pretty cool. So why is it not part of Phoenix? (or am I missing something) This won’t work: defmodule Stuff do defstruct foo: nil, bar: nil end def handle_in("send_stuff", %Stuff{} = my_stuff, socket), do: something_with(my_stuff) The incoming json is already decoded, …

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How to get struct from map - elixir?

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scottyweeks June 9, 2017, 1:40pm 10

Many thanks!

I knew I was missing something.