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Many-to-many relationship with the same model in rails?
...schema for your posts:
create_table "posts", :force => true do |t|
t.string "name", :null => false
end
For any many-to-many relationship, you need a join table. Here's the schema for that:
create_table "post_connections", :force => true, :id => false do |t|
t.integer "post_a_id"...
How are parameters sent in an HTTP POST request?
In an HTTP GET request, parameters are sent as a query string :
8 Answers
8
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The transaction manager has disabled its support for remote/network transactions
I'm using SQL Server and ASP.NET. I have the following function:
10 Answers
10
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Simple logical operators in Bash
... a variable is empty and -e $file to test if a file exists. There are also string equality operators: "$string1" == "$string2" (beware that the right-hand side is a pattern, e.g. [[ $foo == a* ]] tests if $foo starts with a while [[ $foo == "a*" ]] tests if $foo is exactly a*), and the familiar !, &...
How does Python manage int and long?
Does anybody know how Python manage internally int and long types?
9 Answers
9
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Unable to login to SQL Server + SQL Server Authentication + Error: 18456
... see whether that user has relevant privileges on that SQL Server instance and relevant database too, thats good. Obviously if the necessary prvileges are not been set then you need to fix that issue by granting relevant privileges for that user login.
Althought if that user has relevant grants on ...
What is the difference between ArrayList.clear() and ArrayList.removeAll()?
Assuming that arraylist is defined as ArrayList<String> arraylist , is arraylist.removeAll(arraylist) equivalent to arraylist.clear() ?
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Using Java 8's Optional with Stream::flatMap
...de() {
return optional.hashCode();
}
@Override
public String toString() {
return optional.toString();
}
}
You will see that I added flatStream(), as here:
public Stream<T> flatStream() {
if (!optional.isPresent()) {
return Stream.empty();
}
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How to specify different Debug/Release output directories in QMake .pro file
I have a Qt project and I would like to output compilation files outside the source tree.
11 Answers
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What is the motivation for bringing Symbols to ES6?
...t that the :symbol notion in Ruby is needless; we could easily use plain strings instead, like we do in JavaScript. And now they decide to complicate things in JS with that.
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