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How to update a few attributes from the model

O
Oba22 last edited by
How to update some of the model's at "+=1"
```
model.update("in = in + 1, out = out + 1")
```
Makes a mistake. When assigning attributes, you must pass a hash as an argument.The annex works at the Postgres database.
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Analeea last edited by
You're handing over the line. ActiveRecord doesn't know what to do with it. Method update He's waiting.
It'll look like this.
```
model.update(in: (model.in + 1), out: (model.out + 1))
```
or so:
```
model.update_attributes(in: (model.in + 1), out: (model.out + 1))
```
update and update_attributes - Same thing. The second method is alas for the first.
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Check.Is there a record before the update?Are you sure you have an ID in the field?
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Doesn't really matter, but...In this case, you did everything right. Because, first of all, you might have a few forms, and what, for each of you, you'll be coding to get the file expanded? Or, of course, inherit. But again, what if you have the first form of ModelForm, and the second is just Form? For the last one, it's hardly gonna work in a box. You can try some mixin' and use it, but it's a lot of routine work again.Second, you can then decide on asynchronous redoing and twisting some rest-framework, for example. And what, on the screenplayers (formal analysis) again determine the logic for expansion?So, no, you've got the right thing to change. A universal and reliable solution.p.s. It's better to test, not through hell, but through. https://docs.djangoproject.com/en/dev/topics/testing/
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First, there is. render file: путь (sighs) http://guides.rubyonrails.org/layouts_and_rendering.html#rendering-an-arbitrary-file )Second, there is. send_file (sighs) http://api.rubyonrails.org/classes/ActionController/DataStreaming.html#method-i-send_file who's trying to send the file in the best possible way, that's, uh, by handing it to someone else, if possible.For example, if the Rails server is behind nginx- Reverse proxy, the application is not directly answer by the client, but by proxy. empty Response with title X-Accel-Redirect: путь/к/файлу And finish it, but nginx It'll notice Take it away. The headline of the response, and the answer in the body, will be given the file on its own, through its own highly effective IO.But it's a regular way to give such non-state pages - through exceptions that no one caught in the counter. Rails uses a whole chain of mechanisms.Based on Class Exemptions are made to what answer is to be given. https://github.com/rails/rails/blob/3df3d80ade705dd096ec481845ff0fc2d70427b0/actionpack/lib/action_dispatch/middleware/exception_wrapper.rb#L5 )Reply given to a special mini-annex for Rack. https://github.com/rails/rails/blob/5494af0c0f087a959c7f50e6689ff540cedef130/actionpack/lib/action_dispatch/middleware/show_exceptions.rb#L44 )Mini-annex https://github.com/rails/rails/blob/52ce6ece8c8f74064bb64e0a0b1ddd83092718e1/railties/lib/rails/application/default_middleware_stack.rb#L97 By way. Rails.public_path♪..plus all the building blocks.That's the idea, you're gonna have to use the regular Ruby error processing mechanism. Exceptions♪ If you have to add your own exemption classes, put them in the hosh. config.action_dispatch.rescue_responses in configurations, https://github.com/rails/rails/blob/3df3d80ade705dd096ec481845ff0fc2d70427b0/activerecord/lib/active_record/railtie.rb#L19 ♪ Or even write your Rack processor. config.exceptions_app "if you have a beard."♪
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Test using session.save(p) since the method save() Save if it's new, or update if it already exists.
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There are many frameworks and libraries that can help you manipulate ♪, as: JQuery, AngularJS, EmberJS, ReactJS, etc. I will not go into details about them, but basically you can add specific event listeners to elements you want to manipulate. Here is an example of how to change the text of a div by adding a listener to the event click. How to update each X time, you can use the function setInterval, you can see more details about her on http://www.w3schools.com/jsref/met_win_setinterval.asp . I hope I helped. <div id="myId">Original</div> <script> var div = document.getElementById("myId"); // Adicionando ouvinte de clique div.addEventListener("click", function (event) { div.innerHTML = "Alterado =)"; }); // Criando um intervalo var interval = setInterval(function () { var date = new Date(); div.innerHTML = date.toLocaleTimeString(); if (date.getSeconds() % 5 == 0) { div.innerHTML = "Intervalo cancelado :)"; clearInterval(interval); } }, 1000/* 1s */); </script>
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Well I will consider that you already have Rails properly installed and configured on your machine.It was not clear if your method is really a method of Model or a action (a method of Controller), but I think it is a action, because you are calling a method which is probably a method of a Model. Good considering these correct assumptions we can take the following steps to make this work.We create our Controller and ours action (we will use) generator to expedite the procedure)rails g controllerThat will generate our controller in app/controllers/operacoes_controler.rbclass OperacoesController < ApplicationController def somar end end And it will generate our view in app/views/operacoes/somar.html.erb<h1>Operacoes#somar</h1> <p>Find me in app/views/operacoes/somar.html.erb</p> Okay now we're almost there, I don't know your model Registro, not what you want to add, I will consider that he has a field saldo and you want to sum the value of each saldo in all records.*** For test I managed model Registro, but you probably won't need to take this step, put here to demonstrate how I performed the procedure.rails g model record balance:integer*** In the console I created 3 records to test logic, which you probably won't need to perform either.2.3.1 :001 > Registro.create(saldo: 1) => #<Registro id: 1, saldo: 1, created_at: "2016-07-14 23:56:46", updated_at: "2016-07-14 23:56:46"> 2.3.1 :002 > Registro.create(saldo: 2) => #<Registro id: 2, saldo: 2, created_at: "2016-07-14 23:56:50", updated_at: "2016-07-14 23:56:50"> 2.3.1 :003 > Registro.create(saldo: 3) => #<Registro id: 3, saldo: 3, created_at: "2016-07-14 23:56:53", updated_at: "2016-07-14 23:56:53"> Question resolutionPlace value attribution action of OperacoesControllerclass OperacoesController < ApplicationController def somar @valor = Registro.sum('saldo') end end And put it @valor between tags erb <%= @valor =%> in your View (app/views/operacoes/somar.html.erb). Example:<h1>A soma dos saldos de todos os registros é <%= @valor %> </h1> Access: http://localhost:3000/operacoes/somarAnd the result will be something like that: EDIT:If you wanted to re-use this method in several Views one can use one Helper as Raphael quoted. That is, remove from OperacoesController and add in ApplicationHelper,# /app/helpers/application_helper.rb module ApplicationHelper def saldo_total Registro.sum('saldo') end end in your View would look like this#app/views/operacoes/index.html.erb <h1>A soma dos saldos de todos os registros é <%= saldo_total %> </h1>
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= link_to 'форум', url_for(controller: 'forum', action: 'index', subdomain: 'forum', only_path: false)
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I could already solve the problem, if someone else has something similar, possibly a bug in the VS studio, just compile the solution, in case it doesn't work out, do like me and close the project and open it again, so I solve the problem, thanks to those who tried to help me.
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Hi don't declare all your values just do it with a serialize where all the data on your form will be stored when you submit to your "editar_btn" button.$("#editar_btn").submit(function(event) { var parametros = $(this).serialize(); $.ajax({ type: "POST", url: "turl.php", data: parametros, success: function(datos) { alter; } }); event.preventDefault(); }); And normal you get it with your $_POST[name'] and process update$query = "UPDATE productos SET nombre = '$nombre', descripcion = '$descripcion', codigo = '$codigo', categoria = '$categoria', frase_promocional = '$frase_promocional', colores = '$colores', precio = '$precio', disponibilidad = '$disponibilidad', promocion = '$promocion', fecha = '$fecha' WHERE id='$id'"; $query = mysqli_query($conexion,$query ); if($query){ echo "ACTUALIZO"; }else{ echo "Fallo"; } Be careful with quotes in your php, I would recommend you to use visual studio code to view programming errors.
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Your mistake is that you're declaring Name in class getName as a field, and for corrective attachment, it must be characteristic. Replace your code with the model for the following, and get the desired result: public class getName { public string Name { get; set; } } If you've read a book on the PLO, you could see a recommendation to make the fields private, and access to it through the properties that have syntax sugar for the right couple of methods. By doing so, you will be able to provide a correct state for your class data and not break his internal logic. Thus, fields should not be included in the class interface - they should be encapsulated (between, you could also point out that interfaces in C# cannot contain fields but may contain properties - for the same reasons). That's why it's a model-link mechanism in ASP. NET MVC thinks you're following this rule, and it works exactly with the characteristics of the model, not with its fields.
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You didn't think of generating a better thumb ? if you decide to re-size that way I recommend you go to the photouploader app/uploaders/photouploaders controller within that place there is a commented place: # Create different versions of your uploaded files: Here it comes out #-version :thumb do Here comes #-process resize_to_fill: [100, 100] Here you go. in that way where the parameters are you can decide when to leave the resize, then when you make the image tag ≤%= image_tag(parameter.img.thumb) % .thumb flames adds the .thumb and you will have your image in arranged format

How to update a few attributes from the model

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