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20 February, 2021

Laravel Eloquent Cheat Sheet Eloquent ORM

 Programing Coderfunda     February 20, 2021     Laravel, ORM     No comments   

 Laravel Eloquent ORM Cheat Sheet. This tutorial provide you all the laravel eloquent ORM.

Select

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->select('col1','col2')
->select(array('col1','col2'))
->select(DB::raw('businesses.*, COUNT(reviews.id) as no_of_ratings, IFNULL(sum(reviews.score),0) as rating')) 
->addSelect('col3','col4')
->distinct() // distinct select

From

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->from('table')
->from(DB::raw('table, (select @n :=0) dummy'))
->from(DB::raw("({$subQuery->toSql()}) T ")->mergeBindings($subQuery->getQuery())

Where

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->where('column','value')
->where('column','LIKE','%'.$value.'%')
->where(function ($query) {
  $query->where('a', '=', 1)
      ->orWhere('b', '=', 1);
})
->orWhere('column','!=', 'value')
->whereRaw('age > ? and votes = 100', array(25))
 
->whereRaw(DB::raw("id in (select city_id from addresses GROUP BY addresses.city_id)"))
 
->whereExists(function($query)
{
  $query->select(DB::raw(1))
      ->from('business_language')
      ->whereRaw('business_language.language_id = languages.id')
      ->groupBy('business_language.language_id')
      ->havingRaw("COUNT(*) > 0");
})
->orWhereExists()
->whereNotExists()
->orWhereNotExists()
 
->whereIn('column',[1,2,3])
->orWhereIn()
->whereNotIn('id', function($query){
  $query->select('city_id')
  ->from('addresses')
  ->groupBy('addresses.city_id');
})
->whereNotIn()
->orWhereNotIn
 
->whereNull('column') //where `column` is null
->orWhereNull('column') //or where `column` is null
->whereNotNull('column')  //where `column` is not null
->orWhereNotNull('column')  //or where `column` is not null
 
->whereDay()
->whereMonth('column', '=', 1) //
->whereYear('column', '>', 2000) //uses sql YEAR() function on 'column'
->whereDate('column', '>', '2000-01-01')

Joins

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->join('business_category','business_category.business_id','=','businesses.id')
->leftJoin('reviews','reviews.business_id', '=', 'businesses.id')
->join('business_category',function($join) use($cats) {
  $join->on('business_category.business_id', '=', 'businesses.id')
  ->on('business_category.id', '=', $cats, 'and', true);
})
->join(DB::raw('(SELECT *, ROUND(AVG(rating),2) avg FROM reviews WHERE rating!=0 GROUP BY item_id ) T' ), function($join){
  $join->on('genre_relation.movie_id', '=', 'T.id')
})

Eager Loading

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->with('table1','table2')
->with(array('table1','table2','table1.nestedtable3'))
->with(array('posts' => function($query) use($name){
  $query->where('title', 'like', '%'.$name.'%')
    ->orderBy('created_at', 'desc');
}))

Grouping

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->groupBy('state_id','locality')
->havingRaw('count > 1 ')
->having('items.name','LIKE',"%$keyword%")
->orHavingRaw('brand LIKE ?',array("%$keyword%"))

Cache

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->remember($minutes)
->rememberForever()

Offset & Limit

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->take(10)
->limit(10)
->skip(10)
->offset(10)
->forPage($pageNo, $perPage)

Order

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->orderBy('id','DESC')
->orderBy(DB::raw('RAND()'))
->orderByRaw('type = ? , type = ? ', array('published','draft'))
->latest() // on 'created_at' column
->latest('column')
->oldest() // on 'created_at' column
->oldest('column')

Create

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->insert(array('email' => 'john@example.com', 'votes' => 0))
->insert(array(  
  array('email' => 'taylor@example.com', 'votes' => 0),
  array('email' => 'dayle@example.com', 'votes' => 0)
)) //batch insert
->insertGetId(array('email' => 'john@example.com', 'votes' => 0)) //insert and return id

Update

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->update(array('email' => 'john@example.com'))
->update(array('column' => DB::raw('NULL')))
->increment('column')
->decrement('column')
->touch() //update timestamp

Delete

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->delete()
->forceDelete() // when softdeletes enabled
->destroy($ids) // delete by array of primary keys
->roles()->detach() //delete from pivot table: associated by 'belongsToMany'

Getters

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->find($id)
->find($id, array('col1','col2'))
->findOrFail($id)
->findMany($ids, $columns)
->first(array('col1','col2'))
->firstOrFail()
->all()
->get()
->get(array('col1','col2'))
->getFresh() // no caching
->getCached() // get cached result
->chunk(1000, function($rows){
  $rows->each(function($row){
 
  });
})
->lists('column') // numeric index
->lists('column','id') // 'id' column as index
->lists('column')->implode('column', ',') // comma separated values of a column
->pluck('column')  //Pluck a single column's value from the first result of a query.
->value('column')  //Get a single column's value from the first result of a query.

Paginated results

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->paginate(10)
->paginate(10, array('col1','col2'))
->simplePaginate(10)
->getPaginationCount() //get total no of records

Aggregate

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->count()
->count('column')
->count(DB::raw('distinct column'))
->max('rating')
->min('rating')
->sum('rating')
->avg('rating')
->aggregate('sum', array('rating')) // use of aggregate functions

Others

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->toSql() // output sql query
->exists() // check if any row exists
->fresh() // Return a fresh data for current model from database

Object methods

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->toArray() //
->toJson()
->relationsToArray() //Get the model's relationships in array form.
->implode('column', ',') // comma separated values of a column
->isDirty()
->getDirty() //Get the attributes that have been changed but not saved to DB

Debugging

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DB::enableQueryLog();
DB::getQueryLog();
Model::where()->toSql() // output sql query
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