undefined method `txnid' for []:Array - ruby-on-rails

Question

I am trying to display the unique trasactions in my table. Actually I have some duplicate transactions as well. I am getting this below error when I call txnid.uniq on my table.(#all_settlement_details)
undefined method `txnid' for []:Array
Transaction.html.erb
<tr>
<th>Merchant Name</th>
<th>Transaction ID</th>
<th>Payment Mode</th>
<th>Amount</th>
<th>Status</th>
<th>Transaction Fee</th>
<th>Discount</th>
<th>Additional Charges</th>
<th>Added On</th>
</tr>
</thead>
<tbody id="details">
<% #all_settlement_details.txnid.uniq.each do |sd| %>
<tr>
<td><%= sd.merchantname %></td>
<td><%= sd.txnid %></td>
<td><%= get_mode_ui.value(sd.mode) %></td>
<td><%= sd.amount %></td>
<td><%= get_status(sd.status) %></td>
<td><%= sd.mer_service_fee %></td>
<td><%= sd.discount %></td>
<td><%= sd.additional_charges%></td>
<td><%= get_added_on_date sd.addedon %></td>
</tr>
<% end %>
</tbody>
traansactions_helper.rb
def get_all_settlement_details
# Offset increments by 10 and Limit remains 11
_txn_filter_scope = {'transaction_status' => ["status", (params[:transaction_status].split(',') rescue nil)],
'payment_options' => ["payment_options", (params[:payment_options].split(',') rescue nil)],
'transaction_id' => ['transaction_id', params[:transaction_id]],
'transaction_amount' => ['amount_range', ((params[:transaction_amount].split(',')[0] || 0) rescue nil), ((params[:transaction_amount].split(',')[1] || 100000000) rescue nil)],
'merchant_mid' => ['merchant_mid',params[:merchant_mid]],
'merchant_name' => ['merchant_name', params[:merchant_name]],
'clicks' => ['txn_offset', ((params[:clicks].to_i)*10 rescue 0)]
}
method_array = [['settlement_details'],["date_filter", #start_date, #end_date]]
method_array << ["txn_limit", 11] unless #csv_format
method_array << ['merchant_mid', #merchant_mid] if #merchant_mid
records = call_scope_methods_dynamically(method_array, _txn_filter_scope)
records.empty? ? nil : records
end
# Get the multiple payment modes of a trasaction, if any.
def get_multiple_payment_modes txn_id, payment_modes
debugger
PG_MODE
#all_modes = []
#total_trasactions = []
_multiple_modes = {'transaction_id' => ['transaction_id', params[:transaction_id]]}
methods = [['settlement_details'],['merchant_mid'],['transaction_id'], ['payment_modes']]
#total_transactions << ['transaction_id', txn_id] if payment_modes.present?
if #total_transactions[:payment_modes] > 1
payment_modes.each do |m|
#all_modes << m
end
#all_modes
end
end
def get_uniq_transactions txn_id
#all_modes = []
uniq_tr = #all_settlement_details.txn_id.uniq
uniq_tr.payment_modes.each do |m|
#all_modess << m
end
end
How to fix this error and display only unique transactions?
Thanks for your help!

Answer 1

From what I'm seeing, my best guess is that you are calling txnid on an Array, obviously, you are going to see this error.
This error might be coming from your view template, where you are calling txnid on #all_settlement_details, which is not available.
What you might need is, #all_settlement_details.uniq.pluck(:txnid) instead of #all_settlement_details.txnid.uniq in your view template.
PS: I would prefer not to have this logic in the helper as it is shared across the view of the app. Instead, I would like to use a decorator(draper/hand rolled plain ruby object) here.