symfony - How can I fetch a value from the DB and display it in all templates? -


Assume that I have a user and a message my Symfony2 The unit is an app with a one to the relationship between the two organizations, so that the user can have more than one message, and I display the number of unread messages in this kind of main navigation

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  • p> Where (6) unread messages To get this amount of number per user controller independently, I can think of defining the user unit method: 
      public function getUnreadMessagesCount () {$ unreadMessagesCount = 0; Foreign exchange ($ this-> message as $ message) {if ($ message-> Unread ()) {$ unreadMessagesCount ++; }}}   
     and call it in my  menu.html.twig   
      {% set umc = app.user }. GetUnreadMessagesCount ()%} {% if umc & gt; 0%} ({{umc}}} {% endif%}   
     But for performance reasons, I would like to completely avoid looping through message messages just to check it For whether it is unread or not, I prefer to get it through DQL call (and keep this fame in  UserRepository  class)  
      $ Query = $ em- & gt; createQuery (select "select"). D. WHERE M.Rread = Truth and U.ID =: UID ");   
     But the apaic use of the Repository methods or the use of the Entity Manager (or theory) in the unit sections Practicing is to do.  
     I thought about bringing value to the service and inject it into my institution. But this is not recommended to inject the services in signals.  < P> then get this value and come in all the templates What is a legal way to extract (It can be done without any unit methods, for example, controlling the value in all)   
     
     
     I used another solution to get data from a repository.  
     First, define the service:  
      ## bundle / resource / config / services.yml in services: YOUR_BUNDLE .twig.NAME_OF_THE_EXTENSION: Category: Your \ Bundle \ Toggle \ CLASSNAME Argument: - @service_container Tags: - {name: twig.extension}   
     Then define the Tivig extension class:  
      # yOUR_BUNDLE / tweed / CLASSNAME.php

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