How to create custom rake tasks with multiple arguments?

Question

I want to create a custom rake task with supporting multiple arguments.

When finished I want to call the rake task like:

rails conifg:load -i 5 -o "now" ...

How to create them ?

task :task_name, [:arg_1] => [:prerequisite_1, :prerequisite_2] do |task, args|
  argument_1 = args.arg_1
end

But I dont understand it.

user229044 · Answer 1 · 2020-07-15T18:48:15.943

When finished I want to call the rake task like:

rails conifg:load -i 5 -o "now" ...

You can't, that is not how you pass arguments to Rake tasks, those arguments (-i, -o, etc) are passed to Rake itself, not to your task.

Instead, there are a few options:

Use thor which has (in my opinion) a far superior API, and allows for traditional Unix style arguments (-i, --help, etc). You can easily produce a script that would be invoked with:
```
thor config:load -i 5 -o "now"
```
Use Rake's argument system, where you would pass arguments in the form
```
rails config:load[5,now]
```
Build your own script, placed in bin. For example, bin/config can accept arbitrary arguments, and be invoked however you like. Any of the following are possible:
```
./bin/config load -i 5 -o now
./bin/load_config i=5 o=now
./bin/config.load 5 now
# etc
```

1 Answers1