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What is Domain Driven Design (DDD)? [closed]
... that two customers with the same name are not the same customer
Aggregate roots are objects that own other objects. This is a complex concept and works on the basis that there are some objects that don't make sense unless they have an owner. For example, an 'Order Line' object doesn't make sense ...
How to configure postgresql for the first time?
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Under Linux PostgresQL is usually configured to allow the root user to login as the postgres superuser postgres from the shell (console or ssh).
$ psql -U postgres
Then you would just create a new database as usual:
CREATE ROLE myuser LOGIN password 'secret';
CREATE DATABASE myd...
Outputting data from unit test in python
...og.debug() next to each other, and explicitly turn on DEBUG logging at the root from the setUp() method, but only the print output shows up.
– haridsv
Nov 15 '11 at 2:04
7
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How to do an update + join in PostgreSQL?
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coming from mysql it's unintuitive that the same join used for select won't also update just by adding a set phrase :( still - the syntax for this is probably easier for a newcomer to sql to master.
– WEBjuju
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How to determine SSL cert expiration date from a PEM encoded certificate?
... | sort
Sample output:
2015-12-16: /etc/ssl/certs/Staat_der_Nederlanden_Root_CA.pem
2016-03-22: /etc/ssl/certs/CA_Disig.pem
2016-08-14: /etc/ssl/certs/EBG_Elektronik_Sertifika_Hizmet_S.pem
share
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Tar a directory, but don't store full absolute paths in the archive
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The following command will create a root directory "." and put all the files from the specified directory into it.
tar -cjf site1.tar.bz2 -C /var/www/site1 .
If you want to put all files in root of the tar file, @chinthaka is right. Just cd in to the directo...
Tips for debugging .htaccess rewrite rules
... are using a shared hosting service and therefore don't have access to the root server configuration. They cannot avoid using .htaccess files for rewriting and cannot enable a RewriteLogLevel" as many respondents suggest. Also there are many .htaccess -specific pitfalls and constraints are are...
Best practices for in-app database migration for Sqlite
... after migration is %d", [self databaseSchemaVersion]);
}
And here's the root view controller code that invokes the migration, using MBProgressHUD to display a progress bezel:
- (void)viewDidAppear {
[super viewDidAppear];
if ([[Database sharedDatabase] userDatabaseNeedsMigration]) {
...
Can anyone explain python's relative imports?
...rom relative.py
Hello from parent.py
Also it's better to use import from root folder, i.e.:
- sub/start.py
import sub.relative
import parent
Run it like:
PYTHONPATH='.' python3 sub/start.py
Output:
Hello from relative.py
Hello from parent.py
...
MongoDB: Combine data from multiple collections into one..how?
...rrays: ["$employees", "$freelancers"] } } },
// 6. Unwind and replace root so you end up with a result set.
{ $unwind: '$union' },
{ $replaceRoot: { newRoot: '$union' } }
]);
Here is the explanation of how it works:
Instantiate an aggregate out of any collection of your database t...