When I save an apartment record in rails, for some reason it is updating the updated_on field and the created_on field. I can’t figure out how/why the created_on field is being updated.
To try and debug the situation, I opened up a console window and did the following
t = Apartment.find(11619)
t.beds = 4
t.save
When I check my log file, I see the following
SQL (0.0ms) BEGIN
Apartment Load (0.0ms) SELECT `apartments`.id FROM `apartments` WHERE (`apartments`.`unit_num` = BINARY '2005' AND `apartments`.building_id = 17755 AND `apartments`.id <> 11619) LIMIT 1
Apartment Load (0.0ms) SELECT * FROM `apartments` WHERE (`apartments`.`id` = 11619)
Apartment Update (0.0ms) UPDATE `apartments` SET `beds` = 4.0, `updated_on` = '2010-07-31 19:54:10' WHERE `id` = 11619
SQL (0.0ms) COMMIT
This shows only the updated_on field being changed!
So I guess the question is, what could change my created_on value and yet not show up in the rails log file?
EDIT: I know the created_on field is changing because when I do a sql query to check, the value has been updated to be the same as the updated_on field. Also, I display the created_on value to my users, which is what brought this bug to my attention.
EDIT2: The table definition is as follows. I seemed to have solved my problem by changing the default value from “CURRENT_TIMESTAMP” to “0000-00-00 00:00:00”, though I don’t understand why this would make a difference?
Field Type Null Key Default Extra
id int(10) unsigned NO PRI \N auto_increment
building_id int(10) unsigned YES MUL 0
unit_num varchar(45) YES
beds float YES MUL \N
rent int(10) unsigned YES MUL 0
date_available date YES \N
on_market tinyint(1) YES 0
floor varchar(10) YES \N
fee_paid int(10) YES 0
note blob YES \N
created_by int(10) unsigned YES 1
updated_by int(10) unsigned YES 1
created_on timestamp NO CURRENT_TIMESTAMP
updated_on timestamp NO 0000-00-00 00:00:00
lease_expiration_date date YES \N
on_market_date date YES \N
off_market_date date YES \N
tenant_name varchar(40) YES \N
tenant_number varchar(40) YES \N
baths float YES 1
public_note blob YES \N
public_title text YES \N
key_note blob YES \N
status varchar(40) YES Off Market
app_pending tinyint(1) YES 0
app_pending_date date YES \N
Based on the suggestion by Chris Henry, I took a look at my table definition and changed the default value from “CURRENT_TIMESTAMP” to “0000-00-00 00:00:00”. This fixed the issue, though I don’t understand why this would make a difference in my case