Recent questions tagged elixir

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elixir - Connection closed - strange error, unable to connect from erlang VM to certain host

IMPORTANT Proved that migration from 18.3 to 18.3.4 causes this issue, and migration back to 18.3 removes it. ... {inet,[inet],closed}]}} See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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elixir - Render static html page in a controller

Is there a way to read and render a static html file located at another part on server in the ... page via static pages functionality. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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elixir - How to render raw HTML code in Phoenix Framework?

I'm storing raw html from a contenteditable tag in my RethinkDB database. Now I want to display the content ... displaying the raw html itself. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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elixir - Ecto remove preload

Is there any way to do the inverse to preload? %Post{ comments: [] } posts = Repo.all(Post) |> Repo. ... association :comments is not loaded>, } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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elixir - Phoenix additional layout variables like @inner

I am looking to add additional layout parameters like the @inner for the layout. For example @title for the <title> ... in Phoenix. Thanks :D. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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670 views

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elixir - How to make custom prompt take effect at iex start?

I have a custom prompt but when I launch iex, a builtin prompt shows. After I hit enter my prompt takes ... reset ] |> IO.chardata_to_string ) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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elixir - Ecto 2.0 SQL Sandbox Error on tests

I recently upgraded my phoenix project to Ecto 2.0.2. I have some code that is using Task.Supervisor. ... this error does not occur? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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elixir - Pattern match function against empty map

I'm playing around with pattern match and I found out, that it's not quite easy to pattern match parameters of ... way to check for empty maps? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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elixir - How to broadcast a message from a Phoenix Controller to a Channel?

Is there a way to broadcast a message to a channel from outside that channel? Maybe something like Channel. ... implies the channel and topic. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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elixir - How to use raw sql with ecto Repo

I have an upsert requirement, so I need to call a postgres stored procedure or use a common table expression. ... in Rocket.User.__schema__/3 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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695 views

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elixir - Phoenix - controller with multiple render

Trying to create an app with Elixir + Phoenix, that would be able to handle both "browser" and "api" requests ... respond_to do |format| ... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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elixir - How to save/log the output of the iex shell to get persistent command history?

I just started working with Elixir and have been using the iex shell quite a bit. Is it possible for me to save ... " to a file? Thank you. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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385 views

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elixir - What is the benefit of Keyword Lists?

In elixir we have Maps: > map = %{:a => "one", :b => "two"} # = %{a: "one", b: "two" ... benefit. What is the benefit of using Keyword Lists? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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425 views

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elixir - How can I call a module function inside Enum.map without getting an "Undefined reference" error?

I have a simple module containing a single function: defmodule Funcs do def double(x) do x*2 end end When I ... as an argument to Enum.map? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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710 views

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elixir - Render many to many relationship JSON in Phoenix Framework

I have the next models defmodule App.User do use App.Web, :model alias App.User schema "users" do field ... many to many relationships in view? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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433 views

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elixir - Why can't I chain String.replace?

I'm working on a price format function, which takes a float, and represent it properly. ex. 190.5, should be 190,50 ... # -> 299,00 Why is this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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