How to retrieve full data of record by its foreign key in laravel?

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6 Answers

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90%

I've been trying to figure out the proper way to get all the data from a record via a foreign key. I have simple app where users can add books to their "bookshelf". , Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers , Will this Account Lockout mechanism increase the severity of a information leakage vulnerability that leaks usernames? ,I've been scratching my head all day trying to figure out how to take this "join" one step further in Laravel/Eloquent ORM.

Change

Bookshelf::find($id) - > books

to

Bookshelf::with('books') - > find($id) - > books
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88%

The easiest way is to make use of Eloquent's eager loading and fetch all records from table2 and their corresponding record in table1.,So I have 2 tables, TABLE1 and TABLE2. They are linked throug Eloquent: TABLE1 has many TABLE2's, and TABLE2 has one TABLE 1. They are linked with foreign keys as such: in TABLE2 table1_id -> links to -> TABLE1 id.,You need to make the relationship in the models , for example if you have a "Category" and this has many "Products" you need to put this code in your model,How do I retrieve the entire table data or TABLE 2, + replace table1_id with a column of table1 (let's say by booktitle for example)?

This will do the trick:

$results = Table2::with('table1') - > get();

foreach($results as $table2record) {
   echo $table2record - > id; //access table2 data
   echo $table2record - > table1 - > booktitle; //access table1 data
}
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72%

Belongs To Relationships,Querying Relationship Absence,Querying Relationship Existence,Many To Many Relationships

Eloquent relationships are defined as functions on your Eloquent model classes. Since, like Eloquent models themselves, relationships also serve as powerful query builders, defining relationships as functions provides powerful method chaining and querying capabilities. For example, we may chain additional constraints on this posts relationship:

$user - > posts() - > where('active', 1) - > get();
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65%

In this tutorial, I’ll create two tables called users and mobile. Here’s the schema design:, A one-to-one relationship is a very basic relation. In this guide, I’m going to explain one to one eloquent relationship model. I’ll show how to insert data and retrieve data using the eloquent model.,Let’s update the user’s table data and mobile’s table data at once:,Let’s add data to user and mobile from controller:

php artisan make: model Mobile - m
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75%

Joining tables is a fundamental principle of relational databases. In your case, A and B are related with the id column, which means that you can use a syntax similar to this one:,Connect and share knowledge within a single location that is structured and easy to search.,id in table B is a foreign key which relates to the id in table A.,I want to get the contents of table B where id is given and also along with that data, I need the name whose id is given from table A.

Joining tables is a fundamental principle of relational databases. In your case, A and B are related with the id column, which means that you can use a syntax similar to this one:

SELECT a.id, a.name, a.num, b.date, b.roll
FROM a
INNER JOIN b ON a.id = b.id;
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40%

Schema::table('posts', function(Blueprint $table) {
   $table - > unsignedBigInteger('user_id');

   $table - > foreign('user_id') - > references('id') - > on('users');
});
OR
Schema::table('posts', function(Blueprint $table) {
   $table - > foreignId('user_id') - > constrained();
});
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