Paginate() from multiple tables

Rails
1

Hi

I’m wondering if there’s a way I can gather data from multiple tables
from the child table by using the paginate method?

I would have done it using select_by_sql but I need it to paginate.

My table structure is:

Records is a child of Date and Account

Date Account
| |
^ ^
Records

I want to be able to print a table using the Records controller that
will display child records dependent on a specific date/account. So I
need a condition from more than one table.

Can anybody help?

2

I would assume you could use the :joins option of the paginate method to
get
the tables you want. I’m not sure I understand you data structure
though.
Do you have a Record object that has a date_id property that is a
foreign
key to Date.id and an account_id that is a foreign key to Account.id?
So
then I think this would do it:

@record_pages, @records = paginate :records, :per_page => 10,
:joins => [“dates”,“accounts”],
:conditions => ["dates.id = ? and accounts.id = ? ", date_id,
account_id]

3

Paul B. wrote:

I would assume you could use the :joins option of the paginate method to
get
the tables you want. I’m not sure I understand you data structure
though.
Do you have a Record object that has a date_id property that is a
foreign
key to Date.id and an account_id that is a foreign key to Account.id?
So
then I think this would do it:

@record_pages, @records = paginate :records, :per_page => 10,
:joins => [“dates”,“accounts”],
:conditions => ["dates.id = ? and accounts.id = ? ", date_id,
account_id]

Fantastic. You’re an absolute star. That works great - thank you.

4

Doug B. <doug.bromley@…> writes:

Hi

I’m wondering if there’s a way I can gather data from multiple tables
from the child table by using the paginate method?

Hi Doug,

did you get the solution for that? I’m with the same problem.

5

Doug B. <doug.bromley@…> writes:

Hi

I’m wondering if there’s a way I can gather data from multiple tables
from the child table by using the paginate method?

look up this link:

http://tinyurl.com/juec9

I will try the :include option to try to solve it.
That’s only work for rails 1.1.

Just 1 database query for all of this:

authors = Author.find(:all, :include => [
{ :posts => :comments }, :categorizations ])

authors[0].posts[0].comments[0].body # => “Rock on Rails!”
authors[0].categorizations[0].name # => “Less software”