AnthonyGalli.com AnthonyGalli.com - 26 days ago 10
Ruby Question

If URL contains string?

How can I use a conditional to do one thing if

:name
is passed to the _form and another thing if that
:name
isn't passed?

With
:name
passed:

Started GET "/inspirations/new?inspiration%5Bname%5D=Always+trust+yourself+more+than+you+doubt+yourself" for 127.0.0.1 at 2016-11-08 01:00:44 -0500
Processing by InspirationsController#new as HTML
Parameters: {"inspiration"=>{"name"=>"Always trust yourself more than you doubt yourself"}}


Without
:name
passed:

Started GET "/inspirations/new" for 127.0.0.1 at 2016-11-08 01:16:18 -0500
Processing by InspirationsController#new as */*
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1 [["id", 1]]
CACHE (0.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1 [["id", 1]]
Inspiration Load (0.4ms) SELECT "inspirations".* FROM "inspirations" WHERE "inspirations"."id" IS NULL LIMIT 1
Rendered inspirations/_form.html.erb (4.1ms)
Rendered inspirations/new.html.erb within layouts/modal (5.9ms)
Completed 200 OK in 49ms (Views: 41.9ms | ActiveRecord: 0.7ms)


_form

<%= simple_form_for(@inspiration) do |f| %>
<%= f.text_area :name %>
<% if params[:name].nil? %> # Should Be Triggered If No :name Is Present in URL
etc...
<% end %>
<% end %>


So for example when a URL includes a string:

http://www.livetochallenge.com/inspirations/new?inspiration%5Bname%5D=Life+would+be+easier+if+I+had+the+source+code.


But I often use a URL shortener.

Didn't work for me:


Answer

Try this:

<%= simple_form_for(@inspiration) do |f| %> 
  <%= f.text_area :name %>
  <% if params[:inspiration].try(:[], :name).nil? %> # Should Be Triggered If No :name Is Present in URL
    etc...
  <% end %>
<% end %>

This will check :name inside params[:inspiration] only if the later is present. So, no error should occur.

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