Nomethoderror Undefined Method Generate_key For Nil Nilclass
@bwatters-r7 Yeah I don't have a better suggestion for parsing the res. My concern is more of usability / debugging, and whatever caused the underlying issue. A we-cant-think-of-a-better-approach code block should not be the first place to look when debugging. A writer method of the form foo= needs an explicit receiver. When the receiver is omitted, it is not recognized as a method, but as a local variable assignment. When the receiver is omitted, it is not recognized as a method, but as a local variable assignment.
If your error looks like ..
.. this means that you're calling a method on an object that has not been defined properly.
Oct 30, 2017 undefined method `each' for nil:NilClass. と、「for nil:NilClass」とあります。 つまり、nil な何かには「each」メソッドがないから、そんなものは実行できない、のです。 ということは、.each と書いてある、 の部分が nil になっています。 コードを見ると、. Jan 13, 2015 NoMethodError: undefined method `gsub' for nil:NilClass following net-ssh patch upgrade #263. Closed esciara opened this issue Jan 13, 2015 13 comments. The NoMethodError: undefined method 'gsub' for nil:NilClass is somewhat cryptic and has made it difficult to find the origin of the problem (see discussion here. A writer method of the form foo= needs an explicit receiver. When the receiver is omitted, it is not recognized as a method, but as a local variable assignment. When the receiver is omitted, it is not recognized as a method, but as a local variable assignment. Nov 18, 2018 Same thing as well Does any one have an update on this problem.
Step 1: Check return value of method you're is what you expect
Check to see what the return value of the method you're calling is. Is the return value the object you expect? You may need to handle a situation where you receive an false or nil value back.
For example, here we're searching for a contact by an id number that does not exist:
The error:
We expected contact to be defined, but as the contact wasn't found, we couldn't call the method full_name on it.
To fix this error, we could adjust our program like so:
Step 2: Define instance variables before using them
Unlike local variables, which when undefined, raise an undefined local variable error, instance variables start out as a NilClass, and you won't receive a helpful undefined variable style message. Instead, you'll only learn about the issue when you try to call a method on them.
For example, here we're trying to determine someones age by the current year and the year they were born:
Our error:
@current_year was never defined, and as @current_year begins with an @, it is treated as an instance variable. Ruby was expecting that NilClass had a method called - (the subtraction symbol). In other words, the ruby interpreter expected this:
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Of course, we wouldn't add a method like this to NilClass in this way.
Nomethoderror Undefined Method Generate_key For Nil Nilclass 2
What we need to do is define @current_year first: