Recent questions tagged Elixir

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elixir - Parallel processing in Flow is not parallel?

I have a following simple module. defmodule Flow.F1 do def t1 do ["one", "two", "three"] |> ... //stackoverflow.com/questions/65829241/parallel-processing-in-flow-is-not-parallel...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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753 views

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elixir - Mix release not working on Phoenix live view demo app

Background I am toying with Phoenix LiveView and I have setup an app with mix phx.new demo --live --no-ecto ... /65830776/mix-release-not-working-on-phoenix-live-view-demo-app...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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756 views

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elixir - How to force Google Storage file to have `content-disposition: inline` instead of `attachment`?

I'm using GoogleApi.Storage.V1.Api.Objects.storage_objects_insert_simple to upload files to Google Storage. However, ... storage-file-to-have-content-disposition-inline-instead-o...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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626 views

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elixir - How to update the value of nested assigns in LiveView

I'm trying to use nested assigns but cannot find a way to update its values Imagine I have this: def mount ... /65842391/how-to-update-the-value-of-nested-assigns-in-liveview...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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925 views

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elixir - How to encode ecto query results into JSON quickly in IEx?

What is an easy and quick way to encode some Ecto struct from a query in IEx? I'm not looking for how to ... /65846311/how-to-encode-ecto-query-results-into-json-quickly-in-iex...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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638 views

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elixir - Phoenix - Callback action between controller and view

I am building an admin tool app for our system. I want to record every action made by every user. ... .com/questions/65884754/phoenix-callback-action-between-controller-and-view...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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696 views

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elixir - (CaseClauseError) no case clause matching: %{syntax: :proto2}

I have an app that requires diplomat Elixir package and grpc Elixir package, but as soon as I am ... .com/questions/65913980/caseclauseerror-no-case-clause-matching-syntax-proto2...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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elixir - HOWTO Set Column Value on Join Table Record for Many-to-Many Association

I'm trying to make the most out of the conveniences/automagic of the Phoenix/Ecto frameworks to handle database INSERTs ... -value-on-join-table-record-for-many-to-many-association...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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713 views

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elixir - Following a book "Programming Phoenix >= 1.4", got stuck at "Testing Logged-Out Users"

I'm following a book "Programming Phoenix >= 1.4", got stuck at "Testing Logged-Out Users" (Integration Tests, ... a-book-programming-phoenix-1-4-got-stuck-at-testing-logged-out...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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624 views

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elixir - cannot use ^xxx outside of match clauses

This function: defp entries(query, page_number, page_size) do offset = page_size * (page_number - 1) query |> ... .com/questions/38844103/cannot-use-xxx-outside-of-match-clauses...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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452 views

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elixir - Inconsistent Functions behavior

I'm trying out a square and a cube function. Why does square work while cube blows up? square ... from:https://stackoverflow.com/questions/16997059/inconsistent-functions-behavior...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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elixir - Creating a unique constraint on two columns together in Ecto

How do you create a unique index on two columns in Ecto, which would correspond to this: CREATE TABLE someTable ... /creating-a-unique-constraint-on-two-columns-together-in-ecto...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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709 views

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elixir - Couldn't find preset "es2015" relative to directory "web/static/js"

I'm trying to build a vagrant server for dabbling with elixir and phoenix, but after installing all requirements ... couldnt-find-preset-es2015-relative-to-directory-web-static-js...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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715 views

1 answer

elixir - 确定地图是否具有某些键的正确方法(Proper way to determine if a Map has certain keys)

I have a List of required keys (required_keys): (我有一个必需键列表（required_keys）：) ["artist", "track", "year"] and a Map (params): ... 错误的，但不确定如何进行模式匹配 ) ask by Midwire translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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706 views

1 answer

elixir - 确定地图是否具有某些键的正确方法(Proper way to determine if a Map has certain keys)

I have a List of required keys (required_keys): (我有一个必需键列表（required_keys）：) ["artist", "track", "year"] and a Map (params): ... 错误的，但不确定如何进行模式匹配 ) ask by Midwire translate from so...

asked Feb 21, 2021 in Technique[技术] by 深蓝 (71.8m points)

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735 views

1 answer

elixir - Location for a Phoenix helper in a hex package

I created an alternative phx.gen.html which creates templates with TailwindCSS. It works fine. I'd like ... system? The repo: https://github.com/wintermeyer/tailwind_phx_generators...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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626 views

1 answer

elixir - How to spawn a cowboy server in a test?

Background I have a specific test where I need to spawn a cowboy server listening on port 8082 that returns some static ... . Questions How can I start a cowboy server in ExUnit?...

asked Feb 19, 2021 in Technique[技术] by 深蓝 (71.8m points)

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889 views

1 answer

elixir - getting permission denied error when trying to run mix release

I followed this tutorial and created a build with few modifications. After generating a build with dockerfile, when ... good solution to change permission after build is generated?...

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

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761 views

1 answer

elixir - Use Integer.is_even(count) in a template

I customize the phx.gen.html template to use TailwindCSS. In the :show template I use this code: <%= for {{k, _}, ... the value of bg_color between "bg-gray-50" and "bg-white"?...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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865 views

1 answer

elixir - Remove duplicate partner values from a list

I know that in elixir to remove duplicate values from a list, you need to use Enum.uniq(my_list). Given a list of [1, 1, 2, ... [2, 4, 5]. Is there a way not to use nested loops?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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731 views

1 answer

elixir - How to update from deprecated Supervisor.spec to new Supervisor.behaviour?

Background I am trying to build a supervision tree in my app, where a given GenServer will have to supervise other ... I update my code so it does not use deprecated functions?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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