rails partial check if local exists

To check if a local variable exists in a Rails partial, you can use the defined? keyword. Here's how you can do it:

Step 1: Open the Rails partial where you want to check if a local variable exists. Step 2: Use the defined? keyword followed by the local variable name. Step 3: If the local variable exists, it will return the value of the variable. If it doesn't exist, it will return nil.

Here's an example of how you can use the defined? keyword in a Rails partial:

<% if defined?(my_variable) %>
  <p>The value of my_variable is: <%= my_variable %></p>
<% else %>
  <p>my_variable does not exist.</p>
<% end %>

In this example, we first check if the my_variable local variable is defined using defined?(my_variable). If it exists, we display its value in a paragraph tag. If it doesn't exist, we display a message saying that it does not exist.

I hope this explanation helps! Let me know if you have any further questions.