From 0fba70c0824408243934ed454b777a62364dd271 Mon Sep 17 00:00:00 2001 From: Alex Ghiculescu Date: Tue, 9 Mar 2021 16:52:55 -0600 Subject: [PATCH] Clarify when `enctype="multipart/form-data"` gets added to forms [docs] As noted in https://github.com/rails/rails/issues/41632 the docs for this are incorrect. The `enctype` attribute is automatically added anytime you make a form with a `file_field`. Resolves https://github.com/rails/rails/issues/41632 Update actionview/lib/action_view/helpers/form_helper.rb Co-authored-by: Petrik de Heus --- actionview/lib/action_view/helpers/form_helper.rb | 2 +- guides/source/form_helpers.md | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/actionview/lib/action_view/helpers/form_helper.rb b/actionview/lib/action_view/helpers/form_helper.rb index 0e49ab6de6..3c4fdeade2 100644 --- a/actionview/lib/action_view/helpers/form_helper.rb +++ b/actionview/lib/action_view/helpers/form_helper.rb @@ -2426,7 +2426,7 @@ def hidden_field(method, options = {}) # hash with +options+. These options will be tagged onto the HTML as an HTML element attribute as in the example # shown. # - # Using this method inside a +form_for+ block will set the enclosing form's encoding to multipart/form-data. + # Using this method inside a +form_with+ block will set the enclosing form's encoding to multipart/form-data. # # ==== Options # * Creates standard HTML attributes for the tag. diff --git a/guides/source/form_helpers.md b/guides/source/form_helpers.md index 6c835adf49..85bd1acdc9 100644 --- a/guides/source/form_helpers.md +++ b/guides/source/form_helpers.md @@ -644,7 +644,7 @@ Output: Uploading Files --------------- -A common task is uploading some sort of file, whether it's a picture of a person or a CSV file containing data to process. File upload fields can be rendered with the [`file_field`](https://api.rubyonrails.org/classes/ActionView/Helpers/FormBuilder.html#method-i-file_field) helper. The most important thing to remember with file uploads is that the rendered form's `enctype` attribute **must** be set to "multipart/form-data". If you use `form_with` with `:model`, this is done automatically: +A common task is uploading some sort of file, whether it's a picture of a person or a CSV file containing data to process. File upload fields can be rendered with the [`file_field`](https://api.rubyonrails.org/classes/ActionView/Helpers/FormBuilder.html#method-i-file_field) helper. ```erb <%= form_with model: @person do |form| %> @@ -652,11 +652,11 @@ A common task is uploading some sort of file, whether it's a picture of a person <% end %> ``` -If you use `form_with` without `:model`, you must set it yourself: +The most important thing to remember with file uploads is that the rendered form's `enctype` attribute **must** be set to "multipart/form-data". This is done automatically if you use a `file_field` inside a `form_with`. You can also set the attribute manually: ```erb <%= form_with url: "/uploads", multipart: true do |form| %> - <%= form.file_field :picture %> + <%= file_field_tag :picture %> <% end %> ```