Discourseプラグインの開発 - パート1 - 基本的なプラグインの作成

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109

Hmmmm. That’s a tricky one, because the symlink needed to be deleted, otherwise the Docker mount fails (as it cannot overwrite the existing file).

I had a bit of a google around for solutions, and found an interesting solution which would dereference the symlink and copy the symlink’s target into the specified directory, but couldn’t find anything that would create a Docker volume mount, thus preserving the dynamic link and bi-directional synchronisation. Happy to be steered towards a solution as this would be a neat feature to have.

111

Tell me how to add your validation to the app/models /user.rb model?
https://github.com/discourse/discourse/blob/8c2e27790cf7c5fcc883489a7bdf36008fda88ac/app/models/user.rb#L99-L110

「いいね！」 1
112

You can use regular Ruby code to do this in your plugin.rb:

class ::User < ActiveRecord::Base
  validates_presence_of :your_attribute
end
「いいね！」 6
113

Just starting on my first small plugin :blush: I have a few questions I hope someone can help with…

First question is does it matter if we use what’s in this guide or should we really be aiming to use the plugin generator?

It wasn’t covered in this guide, but how can we make data available to our templates from the plugin.rb file?

Let’s say for example I want to display a random welcome message at the plugin-outlet topic-above-posts whenever somebody visits a topic, with the message being randomly selected from an array in plugin.rb… how would I send that data to the template? Which I also presume would go here:

plugins/my_new_plugin/assets/javascripts/discourse/templates/connectors/topic-above-posts/my_new_plugin.hbs (Is this correct?)

Any tips greatly appreciated :blush:

「いいね！」 2
114

Using the plugin generator is generally a great way to get started and see how a plugin should be structured. I recommend it.

Now, regarding how to get ruby code into the front end: those are two different applications. The front end application (Ember) will have to request it from the server (Rails) somehow. Normally we do this via an AJAX call, but you could also do something like add to the SiteSerializer so that it’s sent automatically as part of the forum data.

Otherwise you will have to look up how to add a route/controller in rails and send the messages as JSON.

「いいね！」 8
115

Thanks Robin!

Would you know if there are any tutorials on this? Or, is there a simple plugin (or even a dummy plugin) we can look at that points us in the right direction? (If not, is this something you could quickly put up for us somewhere please? I think it’ll help a lot of people :blush:)

Plus… any more thoughts on writing a book? I can put you in touch with someone if you fancy it :smiley:

「いいね！」 1
116

Thanks for the compliment but I’m definitely far too busy to consider writing a book. Plus tech books have SUPER limited range. Those I know who have written them say you do it for yourself, not for the money :slight_smile:

I can’t think of simple plugin for returning something from the server side. discourse-tooltips adds a route and then uses that to get previews of topics as you mouseover so that might be helpful.

「いいね！」 8
118

Soon, I will start plugin development…

Question:

Is there a list of hooks where we actually can plugin?

For example, say we want to write a plugin to process the cooked data in a post before it is displayed, we would expect there to be at least one hook at the beginning and one at the end, like (for example):

  • display_post_start

  • display_post_complex

Then, our plugin would hook into the code at the hook location of our choice above.

Is there a list of these plugin hooks and what are these plugin hooks called in DiscourseWorld?

Update: Found this:

git grep "plugin-outlet" -- "*.hbs"

But there was no outlet for modifying cooked post content, that I can see.

Is there a tutorial on creating our own outlets, for example, an outlet to modify the cooked part of posts?

「いいね！」 2
119

You’re looking for this guide, section decorateCooked():

「いいね！」 5
133

カスタムプラグインにこのスケルトンを使用しています。今後の Ember 5 への移行にあたり、何か変更する必要はありますか？

おそらく必要ないですよね？これはリンターにすぎませんが？

「いいね！」 1
134

スケルトンはEmber 5と互換性があります。ただし、JavaScriptコードやhbsテンプレートを追加した場合は、アナウンスに記載されているように非推奨の項目を確認する必要があります。

はい、package.jsonにあるものはリンターに関連するだけで、プラグインの機能や互換性には影響しません。

「いいね！」 3
136

これに追加してください

rake plugin:create[plugin-name]

今日は Automating Discourse Plugin Setup with `create-discourse-plugin` gem を見つけようとして長時間を費やしました（このrakeタスクの名前を思い出せなかった理由がわかりません！ :person_shrugging: ）

「いいね！」 5
141

Docker セットアップを使用する際に注意点を追記します。上記の手順では、以下のようなエラーが発生して失敗します。

ambientimpact:~/.../Discourse/discourse$ d/rake plugin:create[neurocracy-date-rewrite]
Cloning 'https://github.com/discourse/discourse-plugin-skeleton' to '/src/plugins/neurocracy-date-rewrite'...
Initializing git repository...
Initialized empty Git repository in /src/plugins/neurocracy-date-rewrite/.git/
Author identity unknown

*** Please tell me who you are.

Run

  git config --global user.email "you@example.com"
  git config --global user.name "Your Name"

to set your account's default identity.
Omit --global to set the identity only in this repository.

fatal: empty ident name (for <discourse@localhost>) not allowed
rake aborted!
Command failed with exit 128: git
/src/lib/tasks/plugin.rake:354:in `system'
/src/lib/tasks/plugin.rake:354:in `block (2 levels) in <main>'
/src/lib/tasks/plugin.rake:344:in `chdir'
/src/lib/tasks/plugin.rake:344:in `block in <main>'
Tasks: TOP => plugin:create
(See full trace by running task with --trace)

プラグインを作成しようとする前に、まずコンテナ内に .gitconfig をセットアップする必要があります（必要に応じてメールアドレスと名前を変更してください）。

d/exec git config --global user.email "you@example.com"
d/exec git config --global user.name "Your Name"
d/rake plugin:create[plugin-name]