Some usages of link_to and button_to

The page originally designed a button, the function is to jump to the index method when pressed, and then implement a function. The key is to pass a parameter Show_all with a value of true.
The index method implements different logic by determining whether it contains this parameter, similar to the following:

If Params[:show_all]
      @products = product.all
    else
      @products = product.where ("locale = =?", I18n.locale.to_ s) End
    

The button is generated by the following code:

<%= button_to (' Show All Products ", Store_index_path (Show_all:true), method:: Get)%>

The actual HTML code generated is as follows:

<form class= "button_to" method= "Get" action= "/cn/store/index?show_all=true" ><input "type=" Submit "value=" Show All Products "/></form>

Exasperating is that the code Show_all parameters are not passed, in the Rails s console is always seen/cn/store/index behind? show_all=true this! When you change the Button_to method parameter to: Post, Show_all parameters can be passed to the background normally, but I do not want to post the way Oh!
Then decided to use Link_to first try:

<%= link_to (t (". show_all_html"), Store_index_path (Show_all:true), class: ' Locale ')%>

The generated code is as follows:

<a class= "locale" href= "/cn/store/index?show_all=true" > Show All Products </a>

Note that the link URL section is identical to the one generated by Button_to! When you click the link, the parameters are passed correctly.
Is it necessary to use link_to to pass arguments without button_to: Get? The answer is NO! After some search, the button_to is implemented using the following methods:

<%= button_to (' Show All Products ', Store_index_path,method:: get,params:{show_all:true})%>