FIX: Undefined Rail Model Error Method

FIX: Undefined Rail Model Error Method

Hopefully this user guide helps you after seeing the undefined method of Rails model error.

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    To learn, I manually created a custom model using a scope and controller rather than scaffolding.

    After filling out the form to create a new client, I receive this log by mistake from the Rails server:

      POST started "/ users", required for 127.0.0.1 27.08.2018 15:52:45 +0530Provided by UsersController # create in HTML  "utf8" => "Γ’Ε“" ", directives:" authentication_token "=>" gdSumxEvNi6ECKBZLFKN9dB / PYLOmixMcf5oYcUGkE1u4iAa / YkJlu7SJbPQNlh6J2SEzR2We ".   (0.2 ms) transaction start with User exists (0.6 ms) SELECT 1 AS ONE OF THE LOWER O "users" ("users". = "e-mail") LOWER LIMIT (?)? [["Email", "[email protected]"], 1]] ["limit", SQL (0.8ms) INSERT "users" ("name", "email", "digest_password", "created_at", "updated_at") VALUES (?,?,?,?,?) [["name", "User1"], ["email", "[email protected]"], ["password_digest", "$ 2a $ 10 $ Efhs2Z2BRa5FCUdSIz6D5.c / eiFQm3JaW818veE644NdoWluRLjoq"], ["2018 created-at "," 2018 created_at "at", "2018-at" 08-27 10: 22: 45.636574 "], [" updated_at "," 2018-08-27 10: 22: 45.636574 "]]   (1.0ms) allocated for transactionUploaded at http://127.0.0.1:3000/users/1302 completed in 93ms (ActiveRecord: 2.6ms)GET "/ users / 1" started at 127.0.0.1 at 15:52:45 on Aug 27, 2018 +0530Handling provided by UsersController # display in HTML  Parameter: "id" => "1"  Make user / show.html.erb in layout / app  Render user / show.html.erb in layout Ax / application (9.8 ms)Executed 500 internal server errors 32ms relative to (ActiveRecord: 0.0ms)ActionView :: Model :: Error (undefined method name nil: NilClass): 1:    2: 

    <% = @ User.name%>

    3:

    <% = @ User.email%>

    app / views / users / show.html.erb: 2: in `_app_views_users_show_html_erb___1408287096995644504_70277415453360 '

    As you can see, the entry was successfully saved to db my, but somehow the @user aspect is destroyed when it hits the show.html.erb template.

    Class

      UsersController  

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  •   

    <% = @ User.name%>

    <% = @ User.email%>

    The @ user.name output at the byebug breakpoint in the user # create action often shows the correct value, whereas at the second byebug breakpoint with the user # show action I get this incredible error:

      (byebug) @ username*** Exception NoMethodError: undefined formulation of 'name' for nil: NilClass 

    To be clear, the second thing I did was create an application, use a scaffold generator, and it worked fine.

    I rewrote some of the checks in the user model (app / models / user.rb). I've always included this below, just in case ...

      Class User  

    Expected Behavior

    Compiling ActionView models is reliable in test and development environments.

    Real Behavior

    Tests (and sometimes the development server) fail regularly, except in cases like

    rails template error undefined method

    In our Gift Rails app, which we recently updated from 5.2.4 to 6.0.3.4, we encounter build errors every day, except for invoices. A few repetitions usually solve the problem sometimes.

    System Configuration

    Sorry, I can't reproduce the directives for the newly found app πŸ™ but basically I have a preview of the ActionView number to understand what's going on.

    I am running a file using controller testing and doing a power test from some run. I can reproduce this error all the time. With pry-debugger also met I found that compiling the ActionView web design seems to be a problem. For some reason, ActionView :: Template sets the code @compiled to true in the file, but our own method_name generated by the model was probably not defined in the view.

    When I go through the code here https://github.com/rails/rails/blob/master/actionview/lib/action_view/template.rb#L152-L154 I come to a transmission that I'm not including:

    For obvious coffee grounds, this will cause ActionView to (re) compile this template and prevent measurement error.

    rails template error undefined method

    Second, I found thatslowing down our first visit to render seems to prevent the situation from occurring. In the controller example mentioned above, I am parsing FoosController # show . Explicitly fooscontroller # show calls render "show" (for independent reasons). If I practically insert a sleep (0.1) call before the render "show" line, the problem goes away. If you then change this sleep ringtone to sleep (0.0) , the error will return. I don’t know what this means, although it seems to be a condition of national culture.

    @jhawthorn , I know you recently created a template. Do you have any idea what could happen here?

      Exception: ActionView :: Template :: Error: course not defined `_app_views_layouts__dmca_html_slim___3627166963330339270_108200 'for # <# : 0x00007fac1eec170>you entered _app_views_layouts__header_nav_html_slim__4252095906685398667_109480 
     outl render (view, locales, buffer = ActionView :: OutputBuffer.new, add_to_stack: important, & block)      instrument_render_template render        compile! (see)       # At this point the model should be compiled with @compiled set to true. But `view.respond_to? (Method_name) `Tax Returns` false`. ??????        view._run (method_name, self, locales, shield, add_to_stack: add_to_stack, & block)      end    restore => e      handle_render_error (view, f)    End 
     outl render (view, locales, buffer = ActionView :: OutputBuffer.new, add_to_stack: true, & block)      instrument_render_template render        @ compiled incorrectly        compile! (see)        view._run (method_name, do it yourself, room, buffer, add_to_stack: add_to_stack, & block) 

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