The proper search result is not coming using Rails 3 - ruby

Question

I need to access all values from Database according to id but i am getting the following output.
Output:
all details are #<PaymentVendor:0x1ee5860>
all details are #<PaymentVendor:0x1f02798>
I am explaining my code below.
#rest_ids=[21,22,23]
#rest_ids.each do |ids|
#pdf_vendor_details = PaymentVendor.where(:id => ids )
puts "all details are #{#pdf_vendor_details}"
end
From the above code i have some array of ids(i.e- #rest_ids).Here my requirement is when the loop will execute as per id the record will fetch and store in the variable #pdf_vendor_details in array.If I wanted to display some value in table then i will be able to do that like below.
table.html.erb:
<table>
<tr>
<td>ID</td>
<td>Receipt No</td>
<td>Amount</td>
</tr>
<% #pdf_vendor_details.each do |details| %>
<tr>
<td><%= details.id %></td>
<td><%= details.Receipt_No %></td>
<td><%= details.Amount %></td>
</tr>
<% end %>
</table>
But doing this way i can not get any value and unable to display data in table.Please help me to access the data from DB which will store in array to display in table.

Answer 1

Try this:
#pdf_vendor_details = PaymentVendor.where(:id => #rest_ids ) #rails 4
#OR
#pdf_vendor_details = PaymentVendor.find_all_by_id(#rest_ids) #rails 3
#pdf_vendor_details.each do |pdf|
puts "all details are: ID => #{pdf.id}, Receipt_No => #{pdf.Receipt_No}, Amount=> #{pdf.Amount}"
end
Your table.html.erb will be not changed

Answer 2

You can try
PaymentVendor.where(id: [21, 22, 23])
which will build a SQL statement like
SELECT * FROM payment_vendors WHERE id IN (21, 22, 23)

Answer 3

I don't see any reason in looping #rest_ids and querying on each iteration
#pdf_vendor_details = PaymentVendor.where(:id => ids )
and in each iteration you are replacing the previous value of #pdf_vendor_details instead of appending to the array.
Instead
#pdf_vendor_details = PaymentVendor.where(id: #rest_ids ) #rails 4
or
#pdf_vendor_details = PaymentVendor.find_all_by_id(#rest_ids) #rails 3
will do. It will send one query to fetch all records of paymentvendor in those ids'.
Update:
If you want to print the contents of the object #pdf_vendor_details in raw form, you could use .inspect or .to_yaml.
For example, puts #pdf_vendor_details.inspect, will print the contents of the object.
Refer this question, to print contents of object.
#rest_ids=[21,22,23]
#pdf_vendor_details = PaymentVendor.where(id: #rest_ids )
puts "All details are, #{#pdf_vendor_details.inspect}"