32 lines
1 KiB
Markdown
32 lines
1 KiB
Markdown
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---
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post_title: 'Today I Learned #4: Passing array/list parameters to Phoenix controller'
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author: dreat
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layout: post
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published: true
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post_date: 2020-04-10 20:00:00
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tags: [til, elixir, phoenix]
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categories: [til, new_blog]
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---
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Hello!
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I had curious _incident_ while working. I was to investigate why our API won't work when passed array as url parameter for GET request.
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So, I peeked into the tests and we had test for it. I logged the incoming parameters and Phoenix got an array and worked with it perfectly. So I decided to grab the big guns. Enter curl.
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It was quite funny. My first insting was to create url like this: `some.url?param=[value1,value2]` but it didn't work. Phoenix read this as
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```elixir
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%{"param" => "[value1,value2]"}
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```
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and no combination of quotes would make this work.
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To skip some other things I tried - the thing you need to do is to use this
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```
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some_url?param[]=value1¶m[]=value2
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```
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Phoenix will read all those values as elements of an array (or, in Elixir's context, a list) and it will work as intended.
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