Rails params array

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Learn more. Ask Question. Asked 5 days ago. Active 5 days ago. Viewed 37 times. Allowed networks: But, it doesn't look like you are sending them to your server as an array. Also check out some of the other answers on that question. Active Oldest Votes. Thang Thang 1 1 gold badge 4 4 silver badges 10 10 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

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rails params array

Feedback on Q2 Community Roadmap. Technical site integration observational experiment live on Stack Overflow. Dark Mode Beta - help us root out low-contrast and un-converted bits. Triage needs to be fixed urgently, and users need to be notified upon….

Linked Related Hot Network Questions. Question feed. Stack Overflow works best with JavaScript enabled.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. In the Rails 3 app, when I create a new question, it inserts into questions table and then into the categorizations table.

In the rails 4 app, after it processes the parameters in QuestionController create, I'm getting this error in the server logs. To declare that the value in params must be an array of permitted scalar values map the key to an empty array:. If you want to permit an array of hashes or an array of objects from the perspective of JSON. I can't comment yet but following on Fellow Stranger solution you can also keep nesting in case you have keys which values are an array.

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Asked 6 years, 11 months ago. Active 4 months ago. Viewed k times. These are the three relevant models are the same for the two versions. Leahcim Leahcim What does the create action look like in both apps? Active Oldest Votes. To declare that the value in params must be an array of permitted scalar values map the key to an empty array: params.

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. How to permit it? I tried params. Read Nested Parameters. Learn more. Permit array in params Ask Question. Asked 3 years, 7 months ago. Active 3 years, 7 months ago. Viewed 6k times. Macabeus Macabeus 2, 2 2 gold badges 23 23 silver badges 42 42 bronze badges.

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Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. This is happening in Rails 4. Check out the discussion at Hi dnagirI know this is surprising, but bare with me - this is actually a feature, not a bug ; This has been added somewhere in the 3.

We are well aware that this is problematic in some cases. I'm sorry that you ran into one of those problematic cases.

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We understand this sucks, and we definitely welcome solutions to make the situation better. See for details. There is also a new config option in 4. I'm closing this for now, but feel free to participate in to explore solutions to make this better!

I agree with what's said in and will use disable deep munge as per The parameters should not be touched by Rails IMO. The Rack application knows nothing about how they can be used and shouldn't make any assumption about it. Replacing empty arrays with nil is a bit silly way of "fixing" the security issues introduced by other layers AR. The developer should know well enough not to blindly trust the user input. The "fix" with with deep munge fixes the wrong problem on a wrong layer and introduces too many issues that go against users' expectations and general common sense.

Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. New issue. Jump to bottom. Copy link Quote reply. This comment has been minimized. Sign in to view. Contributor Author. Add Arkivo API integration Unfortunately, then the controller doesn't accept that as a valid param in the whitelist because it's expecting an arrayso it ignores the param.

Closes Passing empty array in a variable returns an error Update gems to clear security warnings. Updates haven't been taken in a while and there are a few security warnings. This change updates gems.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Request is being sent with javascript window. Is there any workaround to send not ajax Post request. No, GET can only put variables on the url itself.

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You should stick to using a GET request if you are not changing the state of anything, and all you want to to access a read only value. To send an array of ids to rails in a GET request simply name your variable with square brackets at the end.

Do not concatenate your ids as a comma separated list, just pass them individually redundantly. So in the url it would look something like this:. I recently wanted to do this and found a workaround that is a little less complex, and so has some complexity limitations but may also be easier to implement.

Can't speak to security, etc. Homan answer is valid for using an external client e. Inside Rails test cases though, you should not use []. Here's an example:. Query params are a separate hash. Learn more. Passing array of parameters through get in rails Ask Question. Asked 7 years, 9 months ago. Active 3 years, 2 months ago. Viewed 59k times. How do I pass array of parameters through Get method in rails? DGM Rafael Sedrakyan Rafael Sedrakyan 1, 8 8 gold badges 27 27 silver badges 40 40 bronze badges.

It is a huge project. Code is too complicated. I just need to know is there any way to pass array with get method avoiding URL looking this way. Actually I need some workaround for not passing ids through URL. Why the downvote? It's a valid question.

rails params array

Found answer to my question here stackoverflow. Thanks everybody for responses. Active Oldest Votes. Or find another way of filtering it without using huge arrays. This is the convention followed by web servers. So in the url it would look something like this:? Homan Homan Most likely, we want to access data sent in by the user or other parameters in our controller actions.

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Rails does not make any distinction between query string parameters and POST parameters, and both are available in the params hash in our controller:. The params hash is not limited to one-dimensional keys and values.

It can contain arrays and nested hashes. To send an array of values, append an empty pair of square brackets "[]" to the key name:. The value of params[:ids] will now be ["1", "2", "3"].

Note that parameter values are always strings; Rails makes no attempt to guess or cast the type. If we're writing a web service application, we might be more comfortable accepting parameters in JSON format. Also, if we've turned on config.

The parameters will be cloned and wrapped in the key according to our controller's name by default. And assume that we're sending the data to CompaniesController, it would then be wrapped in :company key like this:.

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The params hash will always contain the :controller and :action keys. As an example, consider a listing of users where the list can show either active or inactive users. We can add a route which captures the :status parameter in a "pretty" URL:. When this route is used, params[:foo] will also be set to "bar" just like it was passed in the query string. In the same way params[:action] will contain "index".

The one we got is called strong parameterswhich requires us to tell Rails exactly which parameters are allowed into our controller actions. This is to protect us from "mass assignment" though the ability to grab and automatically assign all controller parameters to our model in one shot makes our job easier.

Here is the same code from Getting Started with Rails that triggers the error:. In this case, we want to both allow and require the title and text parameters for valid use of create. The syntax for this introduces require and permit. This is often factored out into its own method so it can be reused by multiple actions in the same controller, for example create and update.In this guide you will learn how controllers work and how they fit into the request cycle in your application.

After the router has determined which controller to use for a request, the controller is responsible for making sense of the request, and producing the appropriate output. Luckily, Action Controller does most of the groundwork for you and uses smart conventions to make this as straightforward as possible. For most conventional RESTful applications, the controller will receive the request this is invisible to you as the developerfetch or save data from a model, and use a view to create HTML output.

If your controller needs to do things a little differently, that's not a problem, this is just the most common way for a controller to work. A controller can thus be thought of as a middleman between models and views. It makes the model data available to the view so it can display that data to the user, and it saves or updates user data to the model. For more details on the routing process, see Rails Routing from the Outside In.

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The naming convention of controllers in Rails favors pluralization of the last word in the controller's name, although it is not strictly required e. Following this convention will allow you to use the default route generators e.

The controller naming convention differs from the naming convention of models, which are expected to be named in singular form. A controller is a Ruby class which inherits from ApplicationController and has methods just like any other class.

When your application receives a request, the routing will determine which controller and action to run, then Rails creates an instance of that controller and runs the method with the same name as the action.

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Note that the empty method from the example above would work just fine because Rails will by default render the new. By creating a new Clientthe new method can make a client instance variable accessible in the view:.

ApplicationController inherits from ActionController::Basewhich defines a number of helpful methods. This guide will cover some of these, but if you're curious to see what's in there, you can see all of them in the API documentation or in the source itself.

Only public methods are callable as actions. It is a best practice to lower the visibility of methods with private or protected which are not intended to be actions, like auxiliary methods or filters. You will probably want to access data sent in by the user or other parameters in your controller actions. There are two kinds of parameters possible in a web application. The first are parameters that are sent as part of the URL, called query string parameters. The query string is everything after "?

The second type of parameter is usually referred to as POST data. This information usually comes from an HTML form which has been filled in by the user. Rails does not make any distinction between query string parameters and POST parameters, and both are available in the params hash in your controller:. The params hash is not limited to one-dimensional keys and values.

It can contain nested arrays and hashes. To send an array of values, append an empty pair of square brackets "[]" to the key name:.

Most of the time you don't have to worry about this because the browser will encode it for you, and Rails will decode it automatically, but if you ever find yourself having to send those requests to the server manually you should keep this in mind.

rails params array

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