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Foreign keys in mongo?
...at Mongoid and MongoMapper do is to provide you with convenient methods to set up relations quite easily. Check out the link I gave you and ask any thing.
Edit:
In mongoid you will write your scheme like this:
class Student
include Mongoid::Document
field :name
embeds_many :addresses
...
Temporarily switch working copy to a specific Git commit
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git reset --hard <hash> changes the HEAD of the current branch, while with git checkout <hash> you get a detached checkout which does not change any branch, and you can easily return without knowing the original hash ID...
“The file ”MyApp.app“ couldn't be opened because you don't have permission to view it” when running
...e Xcode6 GM. I encountered the same problem. What I did was to go to Build Settings -> Build Options. Then I changed the value of the "Compiler for C/C++/Objective-C" to Default Compiler.
share
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CROSS JOIN vs INNER JOIN in SQL
...lues, it's wrong; for rows as elements they can't be shared. For tables as sets you don't need a Venn diagram. Figure 1 is a common terrible attempt to explain JOIN. Its key is also complex: It's only for tables as sets & only equijoin & only one value; it also represents the input different...
Javascript what is property in hasOwnProperty?
...hasOwnProperty returns true only for the properties that were specifically set in the constructor, or added to the instance later.
to determine if p is defined at all, anywhere, for the object, use if(p instanceof object), where p evaluates to a property-name string.
For example, by default all o...
Insert a line break in mailto body
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
...
iOS 8 removed “minimal-ui” viewport property, are there other “soft fullscreen” solutions?
...enable user to scroll; for minimal-ui to persist, window scroll must be offset on page load and after orientation change. However, there is no way of calculating the dimensions of the minimal-ui using the screen variable, and thus no way of telling when user is in the minimal-ui in advance.
These o...
Best practices for overriding isEqual: and hash
...* result + [self isSelected] ? yesPrime : noPrime;. I then found this was setting result to (eg) 1231, I assume due to the ? operator taking precedence. I fixed the issue by adding brackets: result = prime * result + ([self isSelected] ? yesPrime : noPrime);
– Ashley
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Fastest way to download a GitHub project
I need to download the source code of the project Spring data graph example into my box. It has public read-only access. Is there is an extremely fast way of downloading this code?
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How to close tag properly?
Which one(s) of them is correct?
7 Answers
7
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