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How to construct a REST API that takes an array of id's for the resources
I am building a REST API for my project. The API for getting a given user's INFO is:
5 Answers
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SQL join: selecting the last records in a one-to-many relationship
...omer. I want to get a list of all customers along with their last purchase in one SELECT statement. What is the best practice? Any advice on building indexes?
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Rails find record with zero has_many records associated [duplicate]
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Bah, found it here: https://stackoverflow.com/a/5570221/417872
City.includes(:photos).where(photos: { city_id: nil })
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Remove by _id in MongoDB console
In the MongoDB console how can I remove a record by id? Here's my collection :
11 Answers
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Add new item count to icon on button - Android
...have functional app but wonder how to even approach this? Particulary, I'm interested in how to show Number of "New" items under tabs. What I KNOW how to do - is create new icons with red dots and just display them when new stuff available.
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SQL Server 2008: How to query all databases sizes?
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@Derek Smith - size column is in pages. The size of one page is 8kB, hence the formula SizeInMb = PagesCount * 8 / 1024. I always believed 1MB = 1024kB. I don't think that even Microsoft has enough power to change this :).
– Alex Aza...
Want to find records with no associated records in Rails
...s is still pretty close to SQL, but it should get everyone with no friends in the first case:
Person.where('id NOT IN (SELECT DISTINCT(person_id) FROM friends)')
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Android custom dropdown/popup menu
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Update: To create a popup menu in android with Kotlin refer my answer here.
To create a popup menu in android with Java:
Create a layout file activity_main.xml under res/layout directory which contains only one button.
Filename: activity_main.xml
<R...
Get the Last Inserted Id Using Laravel Eloquent
I'm currently using the below code to insert data in a table:
32 Answers
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Can table columns with a Foreign Key be NULL?
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Yes, you can enforce the constraint only when the value is not NULL. This can be easily tested with the following example:
CREATE DATABASE t;
USE t;
CREATE TABLE parent (id INT NOT NULL,
PRIMARY KEY (id)
) ENGINE=INNODB;
CREATE TABLE...