Retrieve post by category id laravel - php

Question

I want to retrieve all post with given category,
i am developing api, at input i will receive category name, and then i want to retrieve that category by its id in posts table,i want to do this because if some changed category name in the future i dont have to change that in my code
i have create like this
PostController.php
public function getPostsByCategory(Request $request)
{
$posts=Posts::where('category',$request->category)->get();
return response()->json(['posts'=>$posts]);
}
Post model
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Posts extends Model
{
protected $fillable = [
'post_title','post_description', 'category', 'user_id',
];
Category Model
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Posts_Category extends Model
{
}
can you please help me with this, please suggest me any idea

Answer 1

i think you are looking for with eager load function
You must store category id not the name of the category..
class Posts extends Model
{
protected $fillable = [
'post_title','post_description', 'category_id', 'user_id',
];
public function category()
{
return $this->belongsTo(Posts_Category::class, 'category_id', 'id');
}
}
use as
$posts = Posts::where('category_id',$request->category)->with('category')->get();
If you really want to search by name
$posts = Posts::whereHas('category', function ($q) {
$q->where('category_name', 'like', "%{$request->category}%");
})->get();

Answer 2

You can fetch the category by its name first, and then filter posts by category id
public function getPostsByCategory(Request $request)
{
$category = Posts_Category::whereName($request->category)->firstOrFail();
$posts=Posts::where('category',$category->id)->get();
return response()->json(['posts'=>$posts]);
}

Answer 3

you're doing this the wrong way from the get go. best practice is to store category_id in posts table, of course this is only if you need a one-to-many relation between posts and categories table. plus I wouldn't recommend to break the convention of naming models unless you have no other way. I suggest you to read this section more thorough
https://laravel.com/docs/5.6/eloquent-relationships

Answer 4

Please i need a fix solution to this, i want to fetch all the latest post from a specific category in my laravel blog project
These are my models
Category model
public function posts()
{
return $this->belongsToMany('App\Post')->withTimestamps();
}
Post model
public function categories()
{
return $this->belongsToMany('App\Category')->withTimestamps();
}
What's they next thing to do?
please help

Answer 5

$posts = Posts::where('category_id', $category->id)->get();