Question

Thanks for your time !

It’s a simple question but I’ve searched for some time and still cannot get the function suit me.

I get a table named *lr_transaction_tables* in DB and a class LrTransactionsTable < ActiveRecord::Base with it.

I can @entry_ary = LrTransactionsTable.find(:all) to fetch the whole table and present it in the view by :

<table id="trans-war-table">
  <% @entry_ary.each do |item| %>
      <tr>
        <td><%= item.ltname %></td>
        <td><%= item.name %></td>
      </tr>
  <% end %>
</table>

But how do I get the data where the data under ltname column is "specific word" instead of all of it.

I’ve tried @entry_ary = LrTransactionsTable.find_by_ltname( "specific word" ), but it give me the error that undefined methodeach’ for nil:NilClass`

ltname and name is the column name in the table.

Answer 1

For Rails 2

LrTransactionsTable.find(:all, :conditions => {:ltname => "specific word"})

For Rails 3

@entry_ary = LrTransactionsTable.where(ltname: "specific word")

OR

@entry_ary = LrTransactionsTable.where(["ltname =? ", "specific word"])