First of all I want simply get an object inside the current object that I'm sending to my *backend*.

I have this simple `JSON` (generated from a form):

```
{
  "name": "Project 1",
  "project_criteria": [
    {
      "name": "Criterium 1",
      "type": "Type 1",
      "benefit": "1"
    },
    {
      "name": "Criterium 2",
      "type": "Type 2",
      "benefit": "3"
    }
  ]
}

```

My `classes`:

```
class Project < ApplicationRecord
  has_many :project_criteria
  accepts_nested_attributes_for :project_criteria
end

class ProjectCriterium < ApplicationRecord
  belongs_to :project
end

```

**ProjectsController:**

```
def project_params
  params.require(:project).permit(:name,  project_criteria: [] )
end

```

But I still can't access `project_criteria` parameter as you can see below:

```
Started POST "/projects" for 127.0.0.1 at 2016-08-19 16:24:03 -0300
Processing by ProjectsController#create as HTML
  Parameters: {"project"=>{"name"=>"Project 1", "project_criteria"=>{"0"=>{"benefit"=>"1", "name"=>"Criterium 1", "type"=>"Type 1"}, "1"=>{"benefit"=>"3", "name"=>"Criterium 2", "type"=>"Type 2"}}}}
Unpermitted parameter: project_criteria # <-----------

```

**Note:**

By the way, I already tried to use **criterium** instead of **criteria**(which **- in my opinion -** is the correct since it should be pluralized) in `has_many` and `accepts_nested_attributes_for`, but it also doesn't work.

Does someone have a solution for this?