我正在研究如何使用Rails.application.routes.url_helpers.rails_blob_path
我有一堂课

has_one_attached :logo

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然后我就做了

Rails.application.routes.url_helpers.rails_blob_path(record.logo)

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它给了我一个错误

Missing host to link to! Please provide the :host parameter, set default_url_options[:host], or set :only_path to true (ArgumentError)

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好吧我试试

Rails.application.routes.url_helpers.rails_blob_path(obi.logo, host: "wwww.example.com" )
=> "/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBEUT09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--5d977f0c66fecd8c8474355813aad9490fcdfbf2/picture.png"

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结果和

Rails.application.routes.url_helpers.rails_blob_path(obi.logo, only_path: true )
=> "/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBEUT09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--5d977f0c66fecd8c8474355813aad9490fcdfbf2/picture.png"

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当使用host:参数时，我希望它将“www.example.com”附加到输出中。为什么它的结果与only_path: true相同？