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Automatically deleting related rows in Laravel (Eloquent ORM)
...p...
});
}
}
You should probably also put the whole thing inside a transaction, to ensure the referential integrity..
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Adding an identity to an existing column
I need to change the primary key of a table to an identity column, and there's already a number of rows in table.
19 Answe...
jquery if div id has children
... worked for me. I knew I was on the right track with the .children(), but didn't know what was wrong with it. Apparently size could be 0, makes sense.
– Chris
Oct 6 '09 at 18:57
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Querying DynamoDB by date
...pdated Answer:
DynamoDB allows for specification of secondary indexes to aid in this sort of query. Secondary indexes can either be global, meaning that the index spans the whole table across hash keys, or local meaning that the index would exist within each hash key partition, thus requiring the ...
Rails :include vs. :joins
...ails. Here is an explaination of what I understood (with examples :))
Consider this scenario:
A User has_many comments and a comment belongs_to a User.
The User model has the following attributes: Name(string), Age(integer). The Comment model has the following attributes:Content, user_id. For a ...
Is having an 'OR' in an INNER JOIN condition a bad idea?
...tsets:
SELECT *
FROM maintable m
JOIN othertable o
ON o.parentId = m.id
UNION
SELECT *
FROM maintable m
JOIN othertable o
ON o.id = m.parentId
, each of them being an equijoin, however, SQL Server's optimizer is not smart enough to see it in the query you wrote (though the...
Android: how to handle button click
Having a solid experience in non-Java and non-Android area, I'm learning Android.
10 Answers
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How to delete an object by id with entity framework
...ction is Remove. Here is an example
Customer customer = new Customer () { Id = id };
context.Customers.Attach(customer);
context.Customers.Remove(customer);
context.SaveChanges();
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How to pass an object from one activity to another on Android
...ass of your main custom class has implemented Serializable interface to avoid any serialization exceptions. For example:
class MainClass implements Serializable {
public MainClass() {}
public static class ChildClass implements Serializable {
public ChildClass() {}
}
}
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How to send parameters from a notification-click to an activity?
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Take a look at this guide (creating a notification) and to samples ApiDemos "StatusBarNotifications" and "NotificationDisplay".
For managing if the activity is already running you have two ways:
Add FLAG_ACTIVITY_SINGLE_TOP flag to the Intent ...