How to change time zome in different tables in Laravel

问题

Can you give an idea? I have two tables in to postgresql DB. The are filled with recods by two separate csv files. But the records of the first csv file are with local timestamp. The second csv file is with timestamps UTC. So I need to change the time in local of the view in this table that is filled with records with timezone UTC. I used to deal with that problem before using laravel with this code in every page that I need to do that, for example:

date_default_timezone_set('Europe/Sofia');

The controller:

      function getdata_chart(Request $request)
      {
        $start_date = date('d-m-Y 00:00:00');
        $end_date = date('d-m-Y 23:59:59');
        if($request->start_date != '' && $request->end_date != '')
        {
          // if user fill dates
          $dateScope = array($request->start_date ." 00:00:00", $request->end_date ." 23:59:59");
        } else {
          // default load page - today
          $dateScope = array($start_date, $end_date);
        };
        $students = MeasCanal::whereBetween('recordtime', $dateScope)
      ->selectRaw('recordtime')
      ->selectRaw('max(formattedvalue) filter (where fullname = \'Данни.Кота\') as iazovir')
      ->selectRaw('max(formattedvalue) filter (where fullname = \'Данни.Температура\') as temperatura350')
      ->where(function ($query) {
        $query->where('fullname', 'like', "Язовир.Данни.Кота")
              ->orWhere('fullname', 'like', "ГСК_11_350.Данни.Температура");
      })
      ->groupBy('recordtime')
      ->orderBy('recordtime')
      ->get();

        return response()->json($students);

      }
    return response()->json($students);
}

回答1:

Update your Model MeasCanal and add the following :

Import and use :

use Carbon\Carbon;

Add Function :

/**
     * Get the user's recordtime.
     *
     * @param  string  $value
     * @return string
     */
    public function getRecordtimeAttribute($value)
    {
            return Carbon::parse($value)->timezone('Europe/Sofia')->toDateTimeString();

    }

回答2:

I'm not sure this is what you want but i think you can get the idea.

First Method,

You can use accessor;

public function getCustomTimestampAttribute($value)
{
    // you can use your logic here to set your timezone by table
    $timezone = 'Europe/Sofia';
    return Carbon::parse($this->custom_timestamp)->timezone($timezone)->toDateTimeString();
}

then you can get the value like: $model->custom_timestamp

Second Method,

You can use map;

$customDates = $dates->map(function ($date, $key) {
    $date->custom_timestamp = Carbon::parse($date->custom_timestamp)->timezone('Europe/Sofia')->toDateTimeString();
    return $date;
});

EDIT

In your model(MeasCanal) set recordtime attribute;

public function getRecordtimeAttribute($value)
{
    // you can use your logic here to set your timezone by table
    $timezone = 'Europe/Sofia';
    return Carbon::parse($this->recordtime)->timezone($timezone)->toDateTimeString();
}

then you can simply see the result after the query in your controller like

dd($students);

or even simpler to see:

dd($students->first()->recordtime); // first matched rows recordtime attr.

Note: you cant use accessors with raw queries you should use eloquent models btw.

来源：https://stackoverflow.com/questions/60635641/how-to-change-time-zome-in-different-tables-in-laravel

标签

php

laravel

postgresql