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37 lines
1.1 KiB
Markdown
37 lines
1.1 KiB
Markdown
# Link To The Current Page With Query Params
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The `link_to` method is an ActionView helper for generating an `a` tag within a
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Rails view. There are two arguments that tend to comprise this method: the link
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text and a path helper.
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```ruby
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<%= link_to 'Home', root_path %>
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```
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The `link_to` method can be used to generate a link to the current page with
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query params. You can do this be providing a hash instead of a path helper as
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the second argument.
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```ruby
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<%= link_to "All", {filter: 'all'} %>
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<%= link_to "New", {filter: 'new'} %>
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<%= link_to "Posted", {filter: 'posted'} %>
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```
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The hash can contain one or more key-value pairs which will be turned into
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query params and appended to the end of the current base path.
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If these are part of the `posts` index page, then they will render as:
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```html
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<a href="/posts?filter=all">All</a>
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<a href="/posts?filter=new">New</a>
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<a href="/posts?filter=posted">Posted</a>
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```
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This is a great way to create links for a Rails action that presents different
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data based on query params. Often this is an index page where filtering is
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needed.
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[source](https://gorails.com/episodes/rails-link-to-current-page-with-params)
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