Setting the selected value of a dropdown option

Question

I'm working on a simple calculator app in Laravel Blade. We have not moved to models yet, just working in views and routes, so I keep running into options I haven't learned how to use yet.

My application is running without issue but is not retaining the selected value in the dropdown on POST. I am able to print the value to the screen, and it is working in a later selector. I think I just need to write an if statement in the options to set the selected value, but I can't find syntax that I understand/am allowed to use in this project.

    <div class="form-group">
      <select class="form-control form-control-lg" id="operatorInput" name="operatorInput" value="{{Session::get('operator')}}">
        <option value="+" @if(Session::get('operatorInput') == "+" ? "selected" : "" )@endif>Addition (+)</option>
        <option value="-" @if(Session::get('operatorInput') == "-" ? "selected" : "" )@endif>Subtraction (-)</option>   
      </select>
    </div>

I get a throwable error on this example, so I know it isn't correct.

Does this answer your question? [How can I set the default value for an HTML — edgarzamora, Nov 08 '19 at 00:15
No, it doesn't. I want to set the selection and then pass it to POST so my dropdown displays the value selected until I clear it. Setting the default just makes that value the one that is held in session and is then posted. Thank you though! — katies1987, Nov 08 '19 at 02:31

Salim · Answer 1 · 2019-11-07T22:49:52.313

0

The throwable error is due to calling the Session Facade without the \ root indicator, use the session helper instead

For example routes/web.php

Route::get('/', function () {
    session(['operatorInput' => '-']);
    return view('welcome');
});

And welcome.blade.php

<div class="form-group">
    <select class="form-control form-control-lg" id="operatorInput" name="operatorInput"
        value="{{ session('operator') }}">
        <option value="+" {{  (session('operatorInput') == "+") ? "selected" : "" }}>Addition (+)</option>
        <option value="-" {{  (session('operatorInput') == "-") ? "selected" : "" }}>Subtraction (-)</option>
    </select>
</div>

Result

You can keep your current code but you need to add a backslash \ before the \Session facade alias, but I find the helper function to be more elegant for a view file (and shorter)

Hope this helps

edited Nov 07 '19 at 22:49

answered Nov 07 '19 at 22:12

Salim

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I tried just adding the \ before Session, but I continue to get a throwable error with a ' ' T_STRING error. Is there other code that would be helpful to add to get the full picture of what I'm doing? – katies1987 Nov 07 '19 at 22:23
Updated my answer to use ternary operator alone instead of `@if` directives – Salim Nov 07 '19 at 22:31
Maybe the controller code that is setting the value in the session `Session::put('operatorInput', '+');` – Salim Nov 07 '19 at 22:46
Not using controllers, just views and routes – katies1987 Nov 07 '19 at 22:48
I added an example using a route – Salim Nov 07 '19 at 22:50
I was able to save the code, but my refreshed page is now blank. – katies1987 Nov 07 '19 at 22:57
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/202025/discussion-between-katies1987-and-saly-3301). – katies1987 Nov 07 '19 at 23:00

Setting the selected value of a dropdown option

1 Answers1

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