I’m trying to understand how to select only certain rows in my database
using RoR.
As a test I try to find certain clients by adding this code in my list
view…
<% clientlist = Client.find_by_client_status_id(1) %>
<% if clientlist %> <= This prevents me from getting nil errors.
<% for client in clientlist %> <= This seems to try and call ‘each’
method.
…
and
data display …
<% end %>
<% end %>
My clients table has a client_status_id column that I’m trying to use.
It has values for each client such as 1, 2, 3 that corresponde with a
client_status table.
If I do Client.find(:all) in the first line I get all rows from the
database so everythng else seems to be working toherwise.
Once I figure out the correct find_by syntax I think I should move it
into a client model method also.
I’m trying to understand how to select only certain rows in my database
using RoR.
Couple things here.
First, use your controller to do your queries.
def show_clients @clientlist = Client.find_all_by_client_status_id(1)
end
Notice find_all is the variant you want here, not find_by, to get a list
of all clients matching your status ID of 1. If there are none, you get
an empty array, not nil.
Thanks Jeff - Adding the show_clients method into my
clients_controller.rb didn’t work right off, even if I put it within the
def list method. Placing it in application_help.rb or clients_helper.rb
is working though.
I also removed the "@clientlist = " and just call “for clients in
show_clients” to get the list.
Thanks for the pointer. I seems to be working now.
If it’s more proper to place the query into the controller rather than a
helper is there something different I need to do to get it working
there? My application_helper.rb is getting swollen with lot’s of little
find(:all) queries and I’d like to do as right as possible.
