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Helpers for manipulating nested Ecto changesets

License: MIT License

Elixir 95.78% CSS 0.34% JavaScript 1.73% HTML 2.15%

ecto changeset elixir phoenix liveview dynamic-forms

ecto_nested_changeset's Introduction

EctoNestedChangeset

This is a package for manipulating nested Ecto changesets.

Installation

Add ecto_nested_changeset to your list of dependencies in mix.exs:

def deps do
  [
    {:ecto_nested_changeset, "~> 0.2.1"}
  ]
end

Usage

The primary use case of this library is the manipulation of Ecto changesets used as a source for dynamic, nested forms in Phoenix LiveView.

category = %Category{
  posts: [
    %Post{
      id: 1,
      comments: [
        %Comment{body: "potato", id: 1},
        %Comment{body: "you", id: 2}
      ],
      title: "must"
    },
    %Post{comments: [], id: 2, title: "young"}
  ]
}

category
|> Ecto.Changeset.change()
|> append_at(:posts, %Post{title: "Padawan", comments: []})
|> prepend_at([:posts, 0, :comments], %Comment{body: "ecneitaP"})
|> delete_at([:posts, 0, :comments, 1], mode: {:action, :delete})
|> insert_at([:posts, 1], %Post{title: "have"})
|> append_at([:posts, 2, :comments], %Comment{body: "my"})
|> update_at([:posts, 0, :comments, 0, :body], &String.reverse/1)
|> Ecto.Changeset.apply_changes()

%Category{
  posts: [
    %Post{
      comments: [
        %Comment{body: "Patience"},
        %Comment{body: "you", id: 2}
      ],
      id: 1,
      title: "must"
    },
    %Post{title: "have"},
    %Post{
      comments: [%Comment{body: "my"}],
      id: 2,
      title: "young"
    },
    %Post{title: "Padawan"}
  ]
}

Example application

There is an example Phoenix application with a dynamic nested LiveView form in the /example folder of the repository.

git clone https://github.com/woylie/ecto_nested_changeset.git
cd ecto_nested_changeset/example
mix setup
mix phx.server

Note that Postgres needs to be running to use the application.

You can access the application at http://localhost:4000.

Status

This library has a very narrow purpose, which means that even though it is young, it is unlikely that new functionality is going to be added or that the API is going to change. Should you miss something, though, don't hesitate to open an issue. Any issues and problems that may arise will be dealt with swiftly.

ecto_nested_changeset's People

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onigirijack onixus74 newxan brianphilips

ecto_nested_changeset's Issues

add functions for changing order

swap([:pets, 3], 5)
move_up([:pets, 3])
move_down([:pets, 3])
move_to([:pets, 3], 5])

Removal not working after being persisted

Describe the bug
I've tried out the example and it seems that if you save either the "toy" or "pet", their removal no longer works.

To Reproduce
Steps to reproduce the behavior:

Start the example
Add an owner, two pets and two toys
Save it
Go back to edit, and try to delete either a toy or a pet
See that clicking the "X" does

Expected behavior
Being able to delete either toy or pet once it is persisted.

Library and language versions:

main branch

Additional context
I've not been able to reproduce the issue on 5566acd.

My theory is that it relates to the new to_form in Phoenix 1.7

Reference: phoenixframework/phoenix_html#418

add get_at/2 function

Dependency Dashboard

This issue lists Renovate updates and detected dependencies. Read the Dependency Dashboard docs to learn more.

Awaiting Schedule

These updates are awaiting their schedule. Click on a checkbox to get an update now.

Update dependency postgrex to v0.19.1
Update dependency ecto to v3.12.1
Update dependency ecto_sql to v3.12.0

Detected dependencies

github-actions

.github/workflows/ci.yml

actions/checkout v4

erlef/setup-beam v1

actions/cache v4

actions/checkout v4

erlef/setup-beam v1

actions/cache v4

actions/checkout v4

erlef/setup-beam v1

actions/cache v4

actions/cache v4

ubuntu 20.04

ubuntu 20.04

ubuntu 20.04

mix

example/mix.exs

ecto_sql ~> 3.6

esbuild ~> 0.5

floki >= 0.30.0

heroicons ~> 0.5

jason ~> 1.2

phoenix ~> 1.7.0

phoenix_ecto ~> 4.4

phoenix_html ~> 4.0

phoenix_live_reload ~> 1.2

phoenix_live_view ~> 0.20.0

plug_cowboy ~> 2.5

postgrex >= 0.0.0

tailwind ~> 0.2.0

mix.exs

castore ~> 1.0

credo ~> 1.7.0

dialyxir ~> 1.4.1

ecto ~> 3.7

ecto_sql ~> 3.7

ex_doc ~> 0.34

excoveralls ~> 0.18.0

stream_data ~> 1.0

Check this box to trigger a request for Renovate to run again on this repository

Action Required: Fix Renovate Configuration

There is an error with this repository's Renovate configuration that needs to be fixed. As a precaution, Renovate will stop PRs until it is resolved.

Location: renovate.json
Error type: Invalid JSON (parsing failed)
Message: Syntax error near ",
],