Ruby on Rails - No data in Params to save in database - mysql

Question

My problem is similar to this question: Ruby on Rails - Data not saved. Index showing blank values
However the strong params match the answers and no data seems to come through.
If I use params.require(:banktransaction).permit(...) I get an error: param is missing or the value is empty
If i remove the require part, a row is added but with no values.
I went through the view and controller and checked my spelling, for the life of me I can't see what I have missed, can anyone point me in the right direction?
controller:
class BankAccountsController < ApplicationController
def delete
end
def destroy
end
def edit
end
def update
end
def index
#bankaccount = BankAccount.all
end
def show
end
def new
#banktransaction = BankAccount.new(:transactionDate => Time.now, :description => params[:description], :credit => params[:credit], :debit => params[:debit])
end
def create
#banktransaction = BankAccount.new(bank_account_params)
if #banktransaction.save
flash[:notice] = "transaction added successfully."
redirect_to(bank_accounts_path)
else
render('new')
end
end
private
def bank_account_params
params.require(:banktransaction).permit(:transactionDate,:description,:credit,:debit)
end
end
View:
<h1>BankAccounts#new</h1>
<p>Find me in app/views/bank_accounts/new.html.erb</p>
<div class="new transaction">
<h2>Create Transaction</h2>
<%= form_for(#banktransaction, :html => {:multipart =>true }) do |f| %>
<%= render(:partial =>'form', :locals=> {:f => f}) %>
<div class="form-buttons">
<%= f.submit("Create Transaction") %>
</div>
<% end %>
</div>
Form partial:
<%= f.label(:transactionDate) %>: <%= f.date_field(:transactionDate) %><br>
<%= f.label(:description) %>: <%= f.text_field(:description) %><br>
<%= f.label(:credit) %>: <%= f.number_field(:credit) %><br>
<%= f.label(:debit) %>: <%= f.number_field(:debit) %><br>
routes:
Rails.application.routes.draw do
resources :bank_accounts do
member do
get :delete
end
end
# For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end

Answer 1

In short, you just permit wrong params key. It's bank_account and your bank_account_params should be
def bank_account_params
params.require(:bank_account).permit(:transactionDate,:description,:credit,:debit)
end
The Rails's form builder will build your params base on model name, not variable name.
Your new action assign a BankAccount instance
def new
#banktransaction = BankAccount.new(:transactionDate => Time.now, :description => params[:description], :credit => params[:credit], :debit => params[:debit])
end
so the form builder will use bank_account as the param key instead of variable name banktransaction