amnu3387

amnu3387

How to use strings as keys on Maps?

Hi,

so when I Map.put even if I use the string quotation marks on the key Elixir will render the map with atoms. This is further problematic when I save data into the db as JSON, because when retrieving this data, it is all as string keys and no atoms.

Amap
|> Map.put("player_#{number}", %{
      roll: false,
      id: player.id,
      stops_self: %{
        "aether_charge": true
     }})

The real use case is that, when I first create this map, it’s through an individual process, that ultimately, saves it to the db, so if the process gets killed or crashes, when being served again, the db version will be fetched.
Is there any way I can enforce a map to use string keys from the get go? So as to always have to deal with a single type of keys. I’m aware I could write a module that returns either atom or string keys but is there any easy way to be explicit about what type I want my key to be?

Thanks

Marked As Solved

NobbZ

NobbZ

You are not using a string, but quoted atom. Those are meant to be used, when you have symbols which usually can’t be in a simple atom literal: :"$end_of_table". If you want to use a string as key in a map do it like this: %{"key" => 1}.

Also Liked

amnu3387

amnu3387

@kelvinst if I have to be sincere I don’t remember what was the title, but this seems like pretty much to the point :stuck_out_tongue:

amnu3387

amnu3387

LOL then this is much better definitively ^^

Where Next?

Popular in Questions Top

electic
Hi, I am new to Elixir. I am trying to use the DateTime component to insert a date into MySQL however the there seems to be no way to fo...
New
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 records...
New
_russellb
I want to try my hand at web scraping. What tools/libraries do I need to use. I’m hoping to turn this into something professional so don’...
New
hariharasudhan94
lets say i have a sample like a = 20; b = 10; if (a > b) do {:ok, "a"} end if (a < b) do {:ok, b} end if (a == b) do {:ok, "equa...
New
JulienCorb
I am trying to implement my new.html.eex file to create new posts on my website. new.html.eex: <h1>Create Post</h1> <%= ...
New
ashish173
I am using Ecto timestamps with postgres, I can see the timestamps() use the :naive_dateime but for my use case I wanted to store the ti...
New
chensan
I have a User schema with a :from_id field set to type :string: defmodule TweetBot.Repo.Migrations.CreateUsers do use Ecto.Migration ...
New
9mm
I am constructing a JSON object (map) and I need to conditionally set a field. I’m trying to write proper elixir-way code… and I’m at a l...
New
jerry
Good day to you all. I have been struggling to get a query involving like and ilike to work. Can anyone assist me on this, please? pro...
New
aalberti333
As the title describes, I’m trying to run Enum.map() over a list of key/value pairs, where the value is a map. My data looks like this: ...
New

Other popular topics Top

rms.mrcs
Hi, I need to transform a list of numbers into a map where the keys are the indexes and the values are the original values of the list. ...
New
electic
Hi, I am new to Elixir. I am trying to use the DateTime component to insert a date into MySQL however the there seems to be no way to fo...
New
nobody
Hi! In PHP: $_SERVER[‘SERVER_ADDR’] - in Elixir? Searched the docs for ip address and the web, no good results. Thanks!
New
jaysoifer
Is there a way to rollback a specific migration and only that one (“skipping” all the other ones)? Would mix ecto.rollback -v 200809061...
New
jononomo
I am trying to figure out how Mix knows whether the environment is test, dev, or prod – where is this set? Thanks.
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
Brian
What is the proper way to load a module from a file in to IEX? In the python world, doing something like this pretty standard: from ....
New
Lily
In templates/appointment/index.html.eex: <%= for appointment <- @appointments do %> <tr> <td><%= appoi...
New
dogweather
I wrote this comment on r/haskell, and it’s not popular there. :wink: But I think I’m on to something… Haskell reminds me of Java, and e...
New
jason.o
In the code below, if the create action is not set to accept “extra_key” as an input, it errors out with a message shown above. Is there ...
New

Latest on Elixir Forum

We're in Beta

About us Mission Statement