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form_withの備忘録

form_withはform_tag,form_forに取って変わられる存在。

form_withの基本は

html
<% form_with model: @model url: items_path,method: :post do |form| %>
  <% form.text_field :name,id="hoge" %>
  <% form.submit type: "hidden" %>
<% end %>

多分こんな感じ
formの部分のidとclassは自動付与。しかし、text_fieldの部分は手動で付与しなければならない

defaultでajax通信を行う使用。(remote: true)
なので、ajaxを使用しない時にはlocal: trueにしとく

別にmodelがいらない通信ならmodel optionを抜いてもいいし、model: modelの書き方でもok

paramsはこんな感じ

controller
<ActionController::Parameters {"utf8"=>"✓", "model"=>{"name"=>"22"}}>

modelインスタンスの中に入っている入れ子構造になる。paramsに直で入れるならインスタンス指定なして飛ばすといいかと。

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