Ability to explicitly pass in the error to be shown

[alphamarket]

I have a huge complicated form which contains with multiple subforms(in some loops) with custom namings and etc... I process data and validate each model and extract the following error structure:

@errors = {
    :spec => {
        :"1" => {
            :section => {
                :"6" => {
                    :errors => #<ActiveModel::Errors:0x007f0d807811c8 @base=#<BuildDetail id: nil, admin_sections_id: 6, admin_specs_id: 1, value: nil, created_at: nil, updated_at: nil, options: {"admin_stuffs"=>{"id"=>"2"}}>, @messages={:value=>["needs to be filled!"]}, @details={:value=>[{:error=>:blank}]}>
                },
                :"7" => {
                    :errors => #<ActiveModel::Errors:0x007f0d89d0cb98 @base=#<BuildDetail id: nil, admin_sections_id: 7, admin_specs_id: 1, value: nil, created_at: nil, updated_at: nil, options: {"admin_stuffs"=>{"id"=>"1"}}>, @messages={:value=>["needs to be filled!"]}, @details={:value=>[{:error=>:blank}]}>
                },
                :"8" => {
                    :errors => #<ActiveModel::Errors:0x007f0d84604968 @base=#<BuildDetail id: nil, admin_sections_id: 8, admin_specs_id: 1, value: nil, created_at: nil, updated_at: nil, options: {"admin_stuffs"=>{"id"=>"3"}}>, @messages={:value=>["needs to be filled!"]}, @details={:value=>[{:error=>:blank}]}>
                }
            }
        },
        :"2" => {
            :section => {
                :"6" => {
                    :errors => #<ActiveModel::Errors:0x007f0d80234990 @base=#<BuildDetail id: nil, admin_sections_id: 6, admin_specs_id: 2, value: nil, created_at: nil, updated_at: nil, options: {}>, @messages={:value=>["needs to be filled!"]}, @details={:value=>[{:error=>:blank}]}>
                },
                :"7" => {
                    :errors => #<ActiveModel::Errors:0x007f0d8977dc68 @base=#<BuildDetail id: nil, admin_sections_id: 7, admin_specs_id: 2, value: nil, created_at: nil, updated_at: nil, options: {}>, @messages={:value=>["needs to be filled!"]}, @details={:value=>[{:error=>:blank}]}>
                },
                :"8" => {
                    :errors => #<ActiveModel::Errors:0x007f0d8416a0d8 @base=#<BuildDetail id: nil, admin_sections_id: 8, admin_specs_id: 2, value: nil, created_at: nil, updated_at: nil, options: {}>, @messages={:value=>["needs to be filled!"]}, @details={:value=>[{:error=>:blank}]}>
                }
            }
        }
    }
}

I can say which elements are belong to which [:spec]/[:section] but there is no documentation on how can I pass the :errors to the tag? i.e Is there anything like the following in the api?

<%= f.text_field :foobar, error: @errors[:spec][spec_id][:section][section_id][:errors] %>

Thanks in advance.

[mattbrictson]

To my knowledge there is no way to explicitly pass in errors. The form simply delegates to the errors attribute of your model, as you can see here:

https://github.com/bootstrap-ruby/rails-bootstrap-forms/blob/ff4f7ff127d582fbe340e8ca93ec93b0e7acac02/lib/bootstrap_form/form_builder.rb#L400-L402

[alphamarket]

I see.... although I come up with a workaround for this, but how about we add a new option named error for the tags which the user can pass the custom error(like the example above), IF no error passed, then the BS_form consider the object's error?

[mattbrictson]

how about we add a new option named error for the tags which the user can pass the custom error

To be honest, this is not a pattern that I wantbootstrap_form to encourage right now. I think using ActiveRecord's errors attribute is the best solution for most people.

That said, I see how it could come in handy for some edge cases such as yours. If you (or another interested contributor) would like to put together a PR, I'll consider merging it if the implementation is clean and well-tested.

[GBH]

I think this could be a thing. Bootstrap 4 allows setting predefined invalid-feedback on form elements for JS validation. See: https://getbootstrap.com/docs/4.0/components/forms/#validation

I makes sense to allow setting it to whatever you want. Errors that come from Rails during form render will replace default messages.