大约有 40,000 项符合查询结果（耗时：0.0431秒） [XML]
Rails where condition using NOT NIL
...
The canonical way to do this with Rails 3:
Foo.includes(:bar).where("bars.id IS NOT NULL")
ActiveRecord 4.0 and above adds where.not so you can do this:
Foo.includes(:bar).where.not('bars.id' => nil)
Foo.includes(:bar).where.not(bars: { id: nil })
When working wit...
When to use generic methods and when to use wild-card?
...
Active
Oldest
Votes
...
How to add a button dynamically in Android?
...
Active
Oldest
Votes
...
Difference between scaling horizontally and vertically for databases [closed]
...
Active
Oldest
Votes
...
Trigger change() event when setting 's value with val() function
...
Active
Oldest
Votes
...
Why are data transfer objects (DTOs) an anti-pattern?
...
Active
Oldest
Votes
...
Uploading images using Node.js, Express, and Mongoose
...
Active
Oldest
Votes
...
Is there a built-in method to compare collections?
...
Active
Oldest
Votes
...
What is the difference between git clone and checkout?
...
Active
Oldest
Votes
...
How can I check the extension of a file?
...
Active
Oldest
Votes
...