Laravel Get Object From Collection By Attribute

Question

In Laravel  if I perform a query    foods   Food  where     - gt get         then  foods is an Illuminate Collection of Food model objects    Essentially an array of models    However  the keys of this array are simply    0  1  2  3            so if I want to alter  say  the Food object with an id of 24  I can t do this    desired object    foods- gt get 24    desired object- gt color    Green    desired object- gt save         because this will merely alter the 25th element in the array  not the element with an id of 24   How do I get a single  or multiple  element s  from a collection by ANY attribute column  such as  but not limited to  id   color   age   etc     Of course  I can do this   foreach   foods as  food        if   food- gt id    24             desired object    food          break           desired object- gt color    Green    desired object- gt save         but  that s just gross   And  of course  I can do this    desired object   Food  find 24    desired object- gt color    Green    desired object- gt save         but that s even more gross  because it performs an additional unnecessary query when I already have the desired object in the  foods collection   Thanks in advance for any guidance   EDIT   To be clear  you can call - gt find   on an Illuminate Collection without spawning another query  but it only accepts a primary ID   For instance    foods   Food  all     desired food    foods- gt find 21       Grab the food with an ID of 21   However  there is still no clean  non-looping  non-querying  way to grab an element s  by an attribute from a Collection  like this    foods   Food  all     green foods    foods- gt where  color    green       This won t work

User · Answer

I have to point out that there is a small but absolutely CRITICAL error in kalley's answer. I struggled with this for several hours before realizing:

Inside the function, what you are returning is a comparison, and thus something like this would be more correct:

$desired_object = $food->filter(function($item) {
    return ($item->id **==** 24);
})->first();

User · Answer

Elegant solution for finding a value  http   betamode de 2013 10 17 laravel-4-eloquent-check-if-there-is-a-model-with-certain-key-value-pair-in-a-collection   can be adapted    desired object key    food- gt array search 24   food- gt lists  id     if   desired object key     false        desired object    food  desired object key

User · Answer

As the question above when  you are using the where clause you also need to use the get  Or first method to get the result        Get all food        foods   Food  all          Get green food         green foods   Food  where  color    green  - gt get

User · Answer

You can use filter  like so    desired object    food- gt filter function  item        return  item- gt id    24    - gt first      filter will also return a Collection  but since you know there will be only one  you can call first on that Collection   You don t need the filter anymore  or maybe ever  I don t know this is almost 4 years old   You can just use first    desired object    food- gt first function  item        return  item- gt id    24

User · Answer

Laravel provides a method called keyBy which allows to set keys by given key in model    collection    collection- gt keyBy  id     will return the collection but with keys being the values of id attribute from any model    Then you can say     desired food    foods- gt get 21       Grab the food with an ID of 21  and it will grab the correct item without the mess of using a filter function

User · Answer

Since I don t need to loop entire collection  I think it is better to have helper function like this          Check if there is a item in a collection by given key and value     param Illuminate Support Collection  collection collection in which search is to be made     param string  key name of key to be checked     param string  value value of key to be checkied     return boolean object false if not found  object if it is found     function findInCollection Illuminate Support Collection  collection   key   value        foreach   collection as  item            if  isset  item- gt  key   amp  amp   item- gt  key     value                return  item                      return FALSE

User · Answer

I know this question was originally asked before Laravel 5 0 was released  but as of Laravel 5 0  Collections support the where   method for this purpose   For Laravel 5 0  5 1  and 5 2  the where   method on the Collection will only do an equals comparison  Also  it does a strict equals comparison       by default  To do a loose comparison       you can either pass false as the third parameter or use the whereLoose   method   As of Laravel 5 3  the where   method was expanded to work more like the where   method for the query builder  which accepts an operator as the second parameter  Also like the query builder  the operator will default to an equals comparison if none is supplied  The default comparison was also switched from strict by default to loose by default  So  if you d like a strict comparison  you can use whereStrict    or just use     as the operator for where     Therefore  as of Laravel 5 0  the last code example in the question will work exactly as intended    foods   Food  all     green foods    foods- gt where  color    green       This will work          This will only work in Laravel 5 3   cheap foods    foods- gt where  price     lt    5       Assuming  quantity  is an integer       This will not match any records in 5 0  5 1  5 2 due to the default strict comparison     This will match records just fine in 5 3  due to the default loose comparison   dozen foods    foods- gt where  quantity    12

User · Answer

As from Laravel 5 5 you can use firstWhere    In you case    green foods    foods- gt firstWhere  color    green

User · Answer

Use the built in collection methods contain and find  which will search by primary ids  instead of array keys   Example   if   model- gt collection- gt contains  primaryId         var dump  model- gt collection- gt find  primaryId       contains   actually just calls find   and checks for null  so you could shorten it down to   if   myModel    model- gt collection- gt find  primaryId         var dump  myModel

[php] Laravel: Get Object From Collection By Attribute

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