Update first table when data is created in the second table

rubyonrails-talk
1

Hi,

I want to know how to update data in first table when i create data in second table.

For ex:

1)locations-Fields(id,name,reply_data)-TABLE ONE

2)Events-Fields(id,name)-TABLE TWO

I want to know how to update the reply_data column in the first table when data is added to the Events table.

2

this should work with callbacks like after_create or after_save:

http://api.rubyonrails.org/classes/ActiveRecord/Callbacks.html

just define them for table one and do whatever necessary with table two

3

Thorsten Mueller wrote:

this should work with callbacks like after_create or after_save:

ActiveRecord::Callbacks

just define them for table one and do whatever necessary with table two

Can u show me an example as to how to do it..

4

in the model of table two:

after_create :update_reply_data

def update_reply_data   @record = TableOne.find(...)   @record.update_attribute(:reply_data, new_value) end

for: TableOne.find(...) must have some useful findcode, of course and: new_value should be the new value for reply_data, whatever that is, can't see that in your question

if the tables are related in some form, things get more easy if you define this with belongs_to, has_many and so on. but again i can't guess those details from your question

5

Add an after_save filter.

http://api.rubyonrails.com/classes/ActiveRecord/Callbacks.html#M001298