jagdish eashwar ha scritto:
Hi,
The first Catalyst application of mine deals with the leave records of
employees. The second one deals with the hardware that they have been
given. Both these applications require details about the employees like
their name and employee_no. So I put the employee details in one
database called 'common', and the leave particulars in another database
called 'leave' , and the hardware details in a third database called
'hardware'.
I was able to put in the foreign key constraints at the time of table
creation. And these are working. I cannot, for example, insert an
emloyee_no in either the 'leave' or the 'hardware' database if it is not
existing in the 'common' database.
So when I was able to do what I had in mind at the database level, I
thought it would be possible to do the same with Catalyst and
DBIx::Class also. I still haven't lost hope. It would be painful and
inelegant to have to replicate the employee details for each of the web
applications in the respective databases.
I think you are using the word 'database' to refer to both the DBIC
schema and the mysql database, which is confusing.
Since the two dsn in the previous post were the same, I assume your
setup is as follows:
- all the data in a mysql database
- multiple Cat apps, each one with its own DBIC schema, all pointing to
the sama mysql database, but dealing with a subset of tables
If this is the case, then the fact that the fk constraints at the
database level work is to be expected (if you use InnoDB for example).
DBIC, on the other hand, thinks you have multiple databases.
jagdish
On Thu, Jul 3, 2008 at 6:10 PM, Marcello Romani <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Oleg Pronin ha scritto:
How do you imagine yourself a request with join beetween 2
tables in different databases?
This is the reason you can't make relationships between
different schemas.
If it's not a typo, the two schemas connect to the same database on
the mysql side...
Anyway, I think DBIC sees them as two different databases, even if
their connections strings are the same...
2008/7/3 jagdish eashwar <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
<mailto:[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>>:
I am working on two Catalyst applications and had earlier set up
separate Mysql databases for each of them. Since some of the
tables
that these two applications use, are the same, I put the common
tables in a third database and created two models in each of the
Catalyst applications. I am, however, unable to set up
relationships between tables in the common and specific databases.
I used myapp_create.pl to create the two models:
perl script/hardware_create.pl model MyhardwareDB DBIC::Schema
Myhardware::Schema::MyhardwareDB create=static dbi:mysql:hardware
'jag' 'passwd' '{ AutoCommit => 1 }'
perl script/hardware_create.pl model CommonDB DBIC::Schema
Myhardware::Schema::CommonDB create=static dbi:mysql:hardware
'jag'
'passwd' '{ AutoCommit => 1 }'
and then put in the relationships between the employee and
hardware
tables as under:
# in Emp.pm
#employee has many hardware
__PACKAGE__->has_many(emp_hm_hw =>
'Myhardware::Schema::MyhardwareDB::Hardware', 'hw_emp_id');
# in Hardware.pm
#hardware belongs to employee
__PACKAGE__->belongs_to(hw_bt_emp_id =>
'Myhardware::Schema::CommonDB::Emp','hw_emp_id');
When I use these accessors in the tt2 templates, i get an
undef error.
undef error -
DBIx::Class::Relationship::Accessor::__ANON__(): Can't
find source for Myhardware::Schema::MyhardwareDB::Hardware at
/home/jag/catalyst_trials/Myhardware/root/src/usr_fragment.tt2
line 8
What am I doing wrong?
Jagdish
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http://www.ottotecnica.com
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