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55 lines
1.4 KiB
55 lines
1.4 KiB
class Users::BaseController < ApplicationController
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before_action :check_observed_user_exists!
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helper_method :observed_logged_user?, :observed_user
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def observed_user
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@_observed_user ||= (User.find_by_id(params[:user_id]) || User.find_by_login(params[:user_id]))
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end
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def observed_logged_user?
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observed_user.id == User.current&.id
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end
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private
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def check_observed_user_exists!
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return if observed_user.present?
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render_not_found
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end
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def private_user_resources!
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require_login
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return if current_user.admin? || observed_logged_user?
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render_forbidden
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end
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def page_value
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params[:page].to_i <= 0 ? 1 : params[:page].to_i
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end
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def per_page_value
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params[:per_page].to_i > 0 && params[:per_page].to_i < 50 ? params[:per_page].to_i : 20
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end
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alias_method :limit_value, :per_page_value
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def offset_value
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(page_value - 1) * limit_value
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end
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def paginate(objs, **opts)
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page = page_value
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per_page = per_page_value
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return Kaminari.paginate_array(objs).page(page).per(per_page) unless opts[:special] && observed_logged_user?
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# note: 为实现第一页少一条记录，让前端放置新建入口
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if page == 1
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objs.limit(per_page - 1)
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else
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objs.limit(per_page).offset((page - 2) * per_page + per_page - 1)
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end
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end
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end |