CODEWITHSUNDEEP
ruby-on-rails
Aurb
Aurb

Reputation: 15

Undefined method 'find' for [Fri, 20 Jan 2017]:Array

I am trying to loop on dates using group by, but I am getting this error.

"Undefined method 'findings' for [Fri, 20 Jan 2017]:Array"

Controller:

def summary
  @date = Verif.all
  @sub_date = @date.group_by{|d| [d.Submit_Date]}
end

Model:

class Verif < ActiveRecord::Base

  def self.findings
    Verif.where("Findings = ? or Findings = ?", 'FP','FN').count
  end

  def self.received
    Verif.where.not("App_ID", '').count
  end

  def self.tp
    Verif.where("Findings = ?", 'TP').count
  end

end

Views:

    <tr id="thead-value">
       <td><%= @sub_date.each do |date|%></td>
       <% for ds in date %>
         <td><%= ds.findings%></td>
         <td><%= ds.received%></td>
         <td><%= ds.tp%></td>
    </tr>

I am very very new to rails. Thank you in advance!

Upvotes: 0

Views: 115

Answers (1)

Surya
Surya

Reputation: 16002

From controller:

def summary
  @date = Verif.all
  @sub_date = @date.group_by{|d| [d.Submit_Date]}
end

Line:

@sub_date = @date.group_by{|d| [d.Submit_Date]}

will result in this:

#=> {["Fri, 20 Jan 2017"] => [d1, d2], ...}

So when we use it in your view:

@sub_date.each do |date| # date will be the key: ["Fri, 20 Jan 2017"]

Hence the exception for the undefined method.

To solve this, we just need to use key and value in each like so:

@sub_date.each do |_, date| # date will be the value: [d1, d2... ]
                            # and key will be ignored because of a "_"

Upvotes: 1

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