undefined method `capture_haml' for #<#<Class:0xbe53d68>:0xcf9cb24> in rails - ruby

Question

I am working on deleting a branch of a company using rails ajax.
Simple form for company account is -
= simple_form_for #company_account, :remote => true,
:url => company_account_path,
:method => :put do |f|
using this form i am creating, updating and deleting regions and branches of regions.
%div{ :id => 'branches_' + r.id.to_s}= render 'branches',f: f, r: region, company_account: #company_account
relation between company, region and branch is:
company has_many: regions
region belong_to: company
regions has_many: branches
branches belongs_to: regions
In this form i have a partial for displaying regions and branches, which uses form object of company account f. All this is working fine. I'm able to create new regions branches. Now i'm trying to delete branch using ajax.
When this call goes to controller i'm creating a form object for company account to render a partial like - In my controller
#f = view_context.simple_form_for #company_account, :remote => true,
:url => company_account_path,
:method => :put do |f|
render_to_string(:partial => 'company_accounts/branches', :locals => {f: f, r: #region, company_account: #company_account }).html_safe
end
and passing this #f object in responce using javascript as -
$('#branches_' + <%= #region.id%>).html('<%= escape_javascript #f %>');
$('#branches_' + <%= #region.id%>).show();
But unfortunately in response i am getting error -
undefined method `capture_haml' for #<#<Class:0xbe53d68>:0xcf9cb24>
Don't know what i am missing. Can any one please help??
Thanks in advance.
Update:
This is the Backtrace:
ActionView::Template::Error (undefined method `capture_haml' for #<#<Class:0xb9db2a4>:0xc953560>):
1: #inactive_branches
2: = f.simple_fields_for :regions, r do |reg|
3: %table.preferenceDetails
4: %tr
5: %td
app/views/company_accounts/_inactive_branches.html.haml:2:in `_app_views_company_accounts__inactive_branches_html_haml___356774371_104988750'
app/controllers/company_accounts_controller.rb:129:in `block in branches'
app/controllers/company_accounts_controller.rb:122:in `branches'

Answer 1

I fixed this issue by another way.
I am rendering a main partial of regions, in which form for #company account is created. Then kept both active/inactive branches partials in _regions.html.haml adding a condition on it.
When page is loaded it shows active branches by default and on the basis of request sent to show inactive branches then inactive branches partial is rendered.