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Atribut :selected in select_tag

S
Saumya last edited by
There's a choice:
```
<%= select_tag('group_by',
  options_for_select([[]] + @query.groupable_columns.collect {|c| [c.caption,  
    c.name.to_s]}, @query.group_by)) %>
```
Tell me how to add an attribute. :selectedto be default empty, that is. :selected => ""?
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K
kalyn last edited by
Add the third halper parameter. select_tag Attribution include_blank: trueas a result, you will automatically add to the beginning of an empty line that will be chosen by default
```
<%= select_tag('group_by',
  options_for_select(@query.groupable_columns.collect {|c| [c.caption,  
    c.name.to_s]}), include_blank: true) %>
```
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This part of the methodunless @question render status: 404 end Never will be achieved. It's the method. find()if the record is not found, it generates an exception. ActiveRecord::RecordNotFoundwhich results in the return of code 500 instead of 404. You need to either intercept him with an exception and give him 404 in the processor, or keep the current arrangement of the exchena, but give up. find() in favour@question = Question.where(id: params[:id]).first
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You may have previously considered errors. (n+ε)^2 = ^2 + 2nε + ε^2, so if the (2nε + ε^2) part does not fit into the effective number of floating point numbers, the result of taking sqrt becomesq.The maximum number of correct integer values is the following number when IEEE double precision floating point count is assumed.(2^26-1)^2 = 4503599493152769 Reference: http://blog.practical-scheme.net/gauche/20130319-inexact-sqrt (However, you may need to use different evaluation methods because you do not know exactly the Ruby to_i specification.) )Note: You may have misunderstood the condition of the problem. The number above is the maximum number of結果s in the range where the result is not integer even if the IEEE floating point number is sqrt.If an error is a problem that requires the maximum number of点, such as (1) converting it to floating point number, (2) sqrt and (3) rounded integers, andを求める, there may be a larger number because the error is canceled to the good condition. It will be calculated later.
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html<html> <head> <script src="https://code.jquery.com/jquery-2.1.1.js"></script> </head> <body> <select id="area"> <option value="1">北海道</option> <option value="2">青森</option> <option value="3">秋田</option> </select> </body> </html> If you want to specify the value attribute of the option,$("#area option[value=1]").val(); If you want to enable textNode of option,$("#area option[value=1]").text(); If you want to debug the selected options,$("#area option:selected").text(); Home
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The best solution is to give a class to these divs that have forms to be able to select them. Then give the name of ID of each div to value the option No select.Example:<select name="id_tipo_contacto" id="id_tipo_contacto"> <option value="empresa">Contacto empresa</option> <option value="casamento">Contacto casamento</option> </select> <div id="empresa" class="formulario">Mostra formulário empresa</div> <div id="casamento" class="formulario" style="display:none;">Mostra formulário casamento</div> So you just need to do this, using pure JS: http://jsfiddle.net/c4hyM/ var select = document.getElementById("id_tipo_contacto"); var formularios = document.querySelectorAll('.formulario'); select.onchange = function () { for (var i = 0; i < formularios.length; i++) formularios[i].style.display = 'none'; var divID = select.options[select.selectedIndex].value; var div = document.getElementById(divID); div.style.display = 'block'; }; If you want to use jQuery, you can use this: http://jsfiddle.net/c4hyM/1/ $("#id_tipo_contacto").on('change', function(){ $('.formulario').hide(); $('#' + this.value).show(); });
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What you describe on the question Totally. not required polymorph♪rails g model Image file_url rails g model Post image:references body:text rails g model Comment image:references body:text rake db:migrate class Image < ActiveRecord::Base has_many :posts has_many :images end And... that's it. Just... Post and Comment I need you. image_idand ordinary has_many It'll work.And getting all the pictures of the commentaries would look like,Image.all.merge(Comment.joins(:image)) The request will focus on the comments, it will be more like, "take all the pictures that appear in the commentaries." And since it will. INNER JOINthe pictures of several commentaries will come up a few times, so we'll need to add .uniq♪
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I think the bug is in the code, try this code to see<select class="select" name="juego"> <option value="Ninguno" <?php if ($juego == 'Ninguno') {echo 'selected';} ?>>Ninguno</option> <?php foreach ($games as $game){ ?> <?php $game_title = $game['titulo']; $titular = trim($game['titulo']); ?> <option value="<?php echo $game_title ?>" <?php if ($juego == $titular) {echo 'selected';} ?>><?php echo $game['titulo'] ?></option> <?php } ?> </select>
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You can do it. selectBesides, who we're working with now is inactive. However, for "removal" disabled We need to wrap it up. select Total div (e.g.), because events on non-active elements are ignored by browsers.You can not use it. disabledand add a class. https://api.jquery.com/addclass/ / https://api.jquery.com/removeclass/ / http://api.jquery.com/toggleclass/ who will stylish "not active" select-ы necessary. // Если кликнули по "обёртке", в которой есть select $(".select:has(select)").on("click", function() { $("select").attr("disabled", true); // все select - disabled $("select", this).removeAttr("disabled"); // "наш" select не disabled });<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script> <label for="districts"></label> <div class="select"> <select multiple="multiple" id="districts" name="districts"> <option value="191">first</option> <option value="195">second</option> <option value="191">first</option> <option value="195">second</option> </select> </div> <label for="region"></label> <div class="select"> <select multiple="multiple" id="region" name="region"> <option value="191">first</option> <option value="195">second</option> <option value="191">first</option> <option value="195">second</option> </select> </div> <label for="city"></label> <div class="select"> <select multiple="multiple" id="city" name="city"> <option value="191">first</option> <option value="195">second</option> <option value="191">first</option> <option value="195">second</option> </select> </div>It's easier with class. There's no need for a round.$("select").on("click", function() { $("select").addClass("disabled"); $(this).removeClass("disabled"); });.disabled { background: red; }<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.2/jquery.min.js"></script> <label for="districts"></label> <select multiple="multiple" id="districts" name="districts"> <option value="191">first</option> <option value="195">second</option> <option value="191">first</option> <option value="195">second</option> </select> <label for="region"></label> <select multiple="multiple" id="region" name="region"> <option value="191">first</option> <option value="195">second</option> <option value="191">first</option> <option value="195">second</option> </select> <label for="city"></label> <select multiple="multiple" id="city" name="city"> <option value="191">first</option> <option value="195">second</option> <option value="191">first</option> <option value="195">second</option> </select>
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When the user chooses an item from the select client you must make an ajax request to the server asking that the sellers associated with the id of the selected client be returned. For example, create a file called filtar_clients. php at the root of your site, with the following content:<?php $pdo = Conexao::getInstance(); $vendedor = $pdo->prepare("SELECT * FROM usuario WHERE tipo_usuario='Vendedor' AND cliente_atuacao=:cliente"); $vendedor -> bindParam(':cliente',$_GET['id_cliente'],PDO::PARAM_INT); $vendedor->execute(); if($vendedor->rowCount()>=1){ echo '<option value="0">Selecione...</option>'; foreach($vendedor->fetchAll() as $res){ $nome = $res['nome_funcionario']; echo '<option value="'.$nome.'">'.$nome.'</option>'; } } ?> Of course some includes should be made to work properly.And then create and link a javascript file the end of your page (log after the inclusion of jquery), with the following content:<script> $( "#cliente" ).change(function() { var client_id = $(this).val(); $.ajax({ url: '/filtar_clientes.php', method: 'get', data: {id_cliente: cliente_id}, success: function(dados){ //troca conteudo do select com name igual a vendedor com os dados retornado pelo servidor (/filtrar_clientes.php) $('[name="vendedor"]').html(dados); }; }); }); </script> That should work out.
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You're using a multiple selector <select form="main-form" multiple="multiple" id="seleccion" name="seleccion" size ="6"> So you should name your select as an arrangement (select[]) <select form="main-form" multiple="multiple" id="seleccion" name="seleccion[]" size ="6"> This will make when you run your form the $save variable contain an arrangement with all the elements you selected in the select, to verify it you can use the following php functionvar_dump($save); As something additional I advise you to verify that the super global variable $_POST contains something before trying to access some elementif($_POST) { //Mi codigo } Example filled with select with JSONPHP<?php require('../conect-bd.php'); $ref_eq = $_POST['ref_eq']; $equiposSelQ = "SELECT Nombre_Equipo, Ref FROM equipos WHERE Ref ='$ref_eq'"; $resultadoA_E=$conexion->query($equiposSelQ); $data = []; while ($row = $resultadoA_E->fetch_assoc()){ $data[$row["Ref"]] = $row["Nombre_equipo"] } header("Content-Type: application/json"); die(json_encode($data)); ?> JavaScript$.getJSON( "includes/add_equipo.php", function( data ) { $.each(data, function (key, value) { $("#seleccion").append("<option value='" + key + "'>" + value + "</option>"); }); });
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Your type change could potentially result in data loss♪ PostgreSQL makes not apparent only those changes that don't result in loss, but you're moving to a more "box" type, so how to convert existing values, you're gonna have to point out. Obviously.♪ It's such a precaution that you don't kill your own data easily.The postgras has even told you how to correct the postgras language change team, you'd only have to translate this board into a syntaxis of relix players:change_column :stocks, :duration, "integer USING duration::integer" # явное преобразование ^^^^^^^^^^^^^^^^^^^^^^^
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Can you give an example of how you are using humanize?In any case, it a problem with the UTF-8.Test on the console"É".downcase It doesn't work while"É".mb_chars.downcase Yes.Then an output would be to use:"Número É muito longo (máximo: 9 caracteres)".mb_chars.downcase.humanize
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On a normal path of development, you don't stitch the standard secle to that state. It'll be like a dropdown.I recommend that you take a look at the solutions that you can easily recycle, for example. https://github.com/HubSpot/select or https://silviomoreto.github.io/bootstrap-select/ a lot of them, it's like an example. Of course, you can not use it, but just watch what you do there and do in your own way, in any case, you will understand how to achieve the desired effect.If you need this spleen only for navigation, I suggest you give up the idea of selecting and making a normal dropdown.
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Well, I hope this is what you're looking for. I put the example on you. jquery and javascript vanilla // jquery $("#select1").change(function(){ $.get("https://newton.now.sh/derive/"+$(this).val(), function(data, status){ $("#pre").html(JSON.stringify(data)) }); }) // javaScript Vanilla document.getElementById("select2").addEventListener("change",function(){ $.get("https://newton.now.sh/derive/"+this.value, function(data, status){ document.getElementById("pre2").innerHTML = JSON.stringify(data); }); });<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <h2>jquery</h2> <select name="" id="select1"> <option value="x%5E2">opcion1</option> <option value="x%5E5">opcion2</option> <option value="x%5E10">opcion3</option> </select> <pre id="pre"> </pre> <br><br> <h2>javascript vanilla</h2> <select name="" id="select2"> <option value="x%5E2">opcion1</option> <option value="x%5E5">opcion2</option> <option value="x%5E10">opcion3</option> </select> <pre id="pre2"> </pre>

Atribut :selected in select_tag

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