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PORuby class initialize error - undefined method 'has_key?'
 

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    <p>So I was following this <a href="http://old.nycdevshop.com/blog/balanced-payments-part-1" rel="nofollow">Balanced Payments tutorial</a>, and tried tweaking their Payment model to fit my application.</p> <p>Original:</p> <pre><code>class Payment def initialize(email, amount, credit_card_hash) @email = email @amount = (amount * 100).to_i @credit_card_hash = credit_card_hash @buyer = nil @card = nil @errors = [] end end </code></pre> <p>My simplified version (Updated with code of full model):</p> <pre><code>require 'balanced' class Transaction &lt; ActiveRecord::Base attr_reader :errors, :amount def initialize(amount) @amount = (amount * 100).to_i @buyer = nil @card = nil @errors = [] end def charge begin find_or_create_buyer debit_buyer credit_owner return true rescue return false end end private def find_or_create_buyer begin @buyer = current_user.balanced_customer rescue @errors &lt;&lt; 'Your account is invalid' end end def debit_buyer begin payment = @buyer.debit(@amount, "Test transaction") rescue @errors &lt;&lt; 'Your credit card could not be charged' end end def credit_owner begin Balanced::Marketplace.my_marketplace.owner_account.credit(amount) rescue @errors &lt;&lt; 'Your credit card payment did not go through.' end end end </code></pre> <p>The problem is I'm getting what seems like a pure ruby error every time I try to instantiate the class from the rails console,</p> <pre><code>&gt; payment = Transaction.new(0.01) output error: #&lt;NoMethodError: undefined method `has_key?' for nil:NilClass&gt; </code></pre> <p>I've googled around and haven't been able to come up with a good answer.</p> <p>Any ideas?</p>
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    1. USAdam Barthelson
    1. USAdam Barthelson
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    1. COIs there more to the stack trace/error message? Does it say which line or anything?
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    2. CONegative, I was running the test in the rails console, updated my question.
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      1. USAdam Barthelson
    3. COWe might need to see the code for `Transaction` as well, then. The error means that something somewhere is trying to call `has_key?` on a variable (most likely expecting a `Hash`) that is `nil`.
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