"Template missing error " in rails [duplicate] - ruby-on-rails

Question

This question already has answers here:
Rails “Template is missing” error
(2 answers)
Closed 5 years ago.
I am beginner in rails
In routes.rb I have
root 'post#index'
resources :posts
When I click on "new post" for the empty title of the post,I get a error like
Missing template posts/new, application/new with {:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:erb, :builder, :raw, :ruby, :coffee, :jbuilder]}. Searched in: * "/home/supranimbus12/RoR/instagram_app/app/views" * "/home/supranimbus12/.rvm/rubies/ruby-2.3.0/lib/ruby/gems/2.3.0/gems/devise-4.4.0/app/views"
My posts/new.html.erb file like
<h2>New Post</h2>
<hr>
<%= form_for #post do |f| %>
<% f.label :description %>
<% f.textarea :description %>
<hr>
<% f.submit %>
<% end %>

Answer 1

1- change routes as: -
root 'post#index'
resources :posts, except: [:index]
because you have already defined as root of index action
2- now for for new action
def new
#post = Post.new
end
3- in you app/view/posts/new.html.erb
<h2>New Post</h2>
<hr>
<%= form_for #post do |f| %>
<% f.label :description %>
<% f.textarea :description %>
<hr>
<% f.submit %>
<% end %>
3 - after hitting the submit button it will go to create action,
note: - because form_for object automatic hit to create action if object is new otherwise it will hit the update action that's why we generally use this form as partial to use it for edit and new action both
def create
#post = Post.new(post_params)
if #post.save
flash[:notice] = "post saved successfully!"
redirect_to #post
else
flash[:error] = #post.errors.full_messages.to_sentence
render 'new'
end
private
def post_params
params.require(:post).permit!
end
to permit all data make a private method for strong parameter
post_params
and here redirect_to #post will go to show action if post saved in db,as it will make url like post/:id otherwise it will render to new template again. with error flash message.