In Laravel blade you can do:
{{ $variable or 'default' }}
This will check if a variable is set or not. I get some data from the database, and those variables are always set, so I can not use this method.
I am searching for a shorthand 'blade' function for doing this:
{{ ($variable != '' ? $variable : '') }}
It is hard to use this piece or code for doing this beacuse of, I do not know how to do it with a link or something like this:
{{ $school->website }}
I tried:
{{ ($school->website != '' ? '{{ $school->website }}' : '') }}
But, it does not work. And, I would like to keep my code as short as possible ;)
Can someone explain it to me?
UPDATE
I do not use a foreach because of, I get a single object (one school) from the database. I passed it from my controller to my view with:
$school = School::find($id);
return View::make('school.show')->with('school', $school);
So, I do not want to make an #if($value != ''){} around each $variable (like $school->name).
try this:
#if ($value !== '')
{{ HTML::link($value,'some text') }}
#endif
I prefer the #unless directive for readability in this circumstance.
#unless ( empty($school->website) )
{{ $school->website }}
#endunless
With php 7, you can use null coalescing operator. This is a shorthand for #m0z4rt's answer.
{{ $variable ?? 'default' }}
{{ ($school->website != '' ? '{{ $school->website }}' : '') }}
change to
{{ ($school->website != '') ? '' . $school->website . '' : '' }}
or the same code
{{ ($school->website != '') ? "<a href='$school->website' target='_blank'>$school->website</a>" : '' }}
{{ isset($variable) ? $variable : 'default' }}
I wonder why nobody talked about $variable->isEmpty() it looks more better than other. Can be used like:
#if($var->isEmpty())
Do this
#else
Do that
#endif
From Laravel 5.4, you can also use the #isset directive.
#isset($variable)
{{-- your code --}}
#endisset
https://laravel.com/docs/9.x/blade#if-statements
Related
I'm trying to get this working.
<option value="{{$role->id}}" {{ (collect(old('userrole') ?? $user->roles()->pluck('id')->implode(", ") ?? '')->contains($role->id)) ? 'selected':'' }}>{{$role->name}}</option>
For some reason it won't work. It gives back the error: Undefined variable: user.
Any help?
The null-coalescing operator ?? will check if the final result is null or not - it will not take into consideration any variables that may be undeclared to obtain that result.
You can therefor use a ternary operator to see if the $roles value is set or not for that expression.
{{ (collect(
old('userrole')
?? (isset($user)
? $user->roles()->pluck('id')->implode(", ")
: ''
)
)->contains($role->id))
? 'selected'
: '' }}
The old() helper also takes a second parameter, as "default" should the value not exist, which you can use. And since you're looking for a single value, the usage of a ternary operator to output selected can be replaced by a blade #if block.
<option value="{{$role->id}}"
#if (collect(old('userrole', (isset($user) ? $user->roles()->pluck('id')->implode(", ") : ''))->contains($role->id)))
selected
#endif
>{{$role->name}}</option>
You can also reduce som cluttering in the code by using contains() on the object itself (without having to pluck() the id`).
<option value="{{ $role->id }}"
#if (collect(old('userrole', (isset($user) ? $user->roles())->contains($role->id)))
selected
#endif
>{{ $role->name }}</option>
I have this string:
$mystring = "SIZE,DETAIL";
And I´m using:
#if (strpos($mystring, 'SIZE'))
{{ $item->size }}
#endif
#if (strpos($mystring, 'DETAIL'))
{{ $item->detail }}
#endif
But this works fine with SIZE, but not with DETAIL.
What is the problem here?
Since you're using Laravel, you can use str_contains() helper:
#if (str_contains($mystring, 'SIZE'))
The str_contains function determines if the given string contains the given value
This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE.
Try this:
#if (strpos($mystring, 'SIZE') !== false)
{{ $item->size }}
#endif
#if (strpos($mystring, 'DETAIL') !== false)
{{ $item->detail }}
#endif
refer: http://php.net/manual/en/function.strpos.php
When using strpos you need to compare to FALSE. An example of your blade code would be:
#if (strpos($mystring, 'SIZE') !== FALSE)
{{ $item->size }}
#endif
#if (strpos($mystring, 'DETAIL') !== FALSE)
{{ $item->detail }}
#endif
However, when using Laravel, you can use str_contains($haystack, $needles) instead of strpos.
I have role column in users table, and I want to check the value like this in the blade file :
#if ( {{Auth::user()->role }} == '1')
// do something
#endif
Is it possible ?
In blade files, you need to write plain PHP into the #if and others blade statements. So you would need to remove the {{ }}:
#if ( auth()->user()->role == 1)
// do something
#endif
I think you can extend a blade.
https://laravel.com/docs/5.3/blade#extending-blade
It's cool and convenient.
Latest version of Laravel will work with like this. You don't need to use {{}} here.
#if ( Auth::user()->role == 1)
// do something
#endif
#if(\Illuminate\Support\Facades\Auth::user()->hasRole('Admin') == 'Admin')
// do something
#endif
Is there a shorter syntax in Twig to output a conditional string of text?
<h1>{% if not info.id %}create{% else %}edit{% endif %}</h1>
Traditional php is even easier than this:
<h1><?php info['id']? 'create' : 'edit' ?></h1>
This should work:
{{ not info.id ? 'create' : 'edit' }}
Also, this is called the ternary operator. It's kind of hidden in the documenation: twig docs: operators
From their documentation the basic structure is:
{{ foo ? 'yes' : 'no' }}
If you need to compare the value is equal to something you can do :
{{ user.role == 'admin' ? 'is-admin' : 'not-admin' }}
You can use the Elvis Operator inside twig :
{{ user ? 'is-user' }}
{{ user ?: 'not-user' }} // note that it evaluates to the left operand if true ( returns the user ) and right if not
The null-coalescing operator also working, like:
{% set avatar = blog.avatar ?? 'https://example.dev/brand/avatar.jpg' %}
Does Twig support ternary (shorthand if-else) operator?
I need some conditional logic like:
{%if ability.id in company_abilities %}
<tr class="selected">
{%else%}
<tr>
{%endif%}
but using shorthand in Twig.
{{ (ability.id in company_abilities) ? 'selected' : '' }}
The ternary operator is documented under 'other operators'
You can use shorthand syntax as of Twig 1.12.0
{{ foo ?: 'no' }} is the same as {{ foo ? foo : 'no' }}
{{ foo ? 'yes' }} is the same as {{ foo ? 'yes' : '' }}
Support for the extended ternary operator was added in Twig 1.12.0.
If foo echo yes else echo no:
{{ foo ? 'yes' : 'no' }}
If foo echo it, else echo no:
{{ foo ?: 'no' }}
or
{{ foo ? foo : 'no' }}
If foo echo yes else echo nothing:
{{ foo ? 'yes' }}
or
{{ foo ? 'yes' : '' }}
Returns the value of foo if it is defined and not null, no otherwise:
{{ foo ?? 'no' }}
Returns the value of foo if it is defined (empty values also count), no otherwise:
{{ foo|default('no') }}
If the price exists from the database for example then print (Price is $$$) else print (Not Available) and ~ for the concatenation in Twig.
{{ Price is defined ? 'Price is '~Price : 'Not Available' }}
I just used a as a general variable name. You can also use endless if else like this:
{{ a == 1 ? 'first' : a == 2 ? 'second' : 'third' }}