Rails: parameter missing in update action -

here's error message:

actioncontroller::parametermissing in userscontroller#update param missing or value empty: user 

full error log

actioncontroller::parametermissing (param missing or value empty: user):   app/controllers/users_controller.rb:36:in `update_user_params'   app/controllers/users_controller.rb:15:in `update' 

the error highlights line:

def update_user_params       params.require(:user).permit(:role)     end 

the parameters on error these:

{"utf8"=>"✓",  "_method"=>"put",  "authenticity_token"=>"nvso53f3pfihoxdthmfcaxgtidaewnxppsgtnzkp/zc=",  "admin"=>{"role"=>"user"},  "commit"=>"make user",  "id"=>"2"} 

here's form i'm using: show.html.erb

<tr id="dashfield">     <td><%= @user.first_name%></td>     <td><%= @user.last_name %></td>     <td><%= @role %></td>     <td><% if @role == 'admin'%>           <%= form_for @role, method: :put |f|%>           <%= f.hidden_field :role, :value => 'user'%>           <%= f.submit 'make user'%><%end%>           <%else%>           <%= form_for @role, method: :put |f| %>           <%= f.hidden_field :role, :value => 'admin'%>           <%= f.submit 'make admin'%>           <%end%>           <%end%></td> </tr> 

here's controller:

class userscontroller < applicationcontroller   def new     @user = user.new   end   def index     @allusers = user.all   end   def show     @user = user.find(params[:id])     @role = @user.role   end   def update     @user = user.find(params[:id])     if @user.update(update_user_params)     redirect_to '/users'     else       redirect_to "/users/#{id}"     end   end   def create     @user = user.new(user_params)     @user.role = 'user'     if @user.save       session[:user_id] = @user.id       redirect_to '/hours/new'     else       redirect_to '/signup'     end   end   private   def user_params     params.require(:user).permit(:first_name, :last_name, :email, :password)   end     def update_user_params       params.require(:user).permit(:role)     end end 

is error saying cannot find databse, user? solutions problem?

your error saying:

actioncontroller::parametermissing in userscontroller#update param missing or value empty: user 

because update_user_params requires user present in params. not present in params currently, it's throwing error.

see here know how params.require works.

in form, can try adding this:

<%= f.hidden_field :user, { :value => @user } %> 

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