[英]Rails : Wrong number of arguments (given 1, expected 0)
我在posts
索引頁面上收到此錯誤:
這是 model:
class Post < ApplicationRecord
include Filterable
belongs_to :region
belongs_to :category
belongs_to :topic
validates :title, presence: true, length: { maximum: 500 }
validates :content, presence: true
validates :published_at, presence: true
translates :title, :content, :slug, touch: true, fallbacks_for_empty_translations: true
has_attached_file :image, styles: { thumb: "100x70#", featured: "1560x868#", small: "760x868#", big: ">1600x1600" }
validates_attachment :image, content_type: { content_type: ["image/jpeg", "image/gif", "image/png"] }
validates_attachment_presence :image
scope :published, -> (published) { where(published: (['true', true].include? published)).order(featured: :desc, published_at: :desc) }
scope :published_until_now, -> { where("published_at < ?", Time.now).merge(Post.published(true)) }
scope :topic, -> (topic_id) {
joins(:topic).where('topic_id = ?', topic_id) }
scope :category, -> (post_category) {
joins(:category).where('category_id = ?', post_category) }
scope :match, -> (search_term) {
with_translations(I18n.locale).where('content like ? or title like ?', "%#{search_term}%", "%#{search_term}%") }
self.per_page = 10
after_save :unfeature_older_posts, if: Proc.new { |post| post.featured? }
extend FriendlyId
friendly_id :title, use: :globalize
def unfeature_older_posts
featured_posts = Post.where(featured: true).where.not(id: id).order(published_at: :desc)
if featured_posts.size == 1
featured_posts.last.update(featured: false)
end
end
end
這是 controller:
class PostsController < ApplicationController
before_action :get_pages_tree, :get_privacy_policy, only: [:index, :show]
def index
@filters = params.slice(:topic, :category)
@posts = Post.published_until_now
.filter(@filters)
.paginate(:page => params[:page], per_page: 11)
end
def show
@post = Post.friendly.find(params[:id])
end
end
和filter
在這里定義:
module Filterable
extend ActiveSupport::Concern
module ClassMethods
def filter(filtering_params)
results = self.where(nil)
filtering_params.each do |key, value|
results = results.public_send(key, value) if value.present?
end
results
end
end
end
我不確定 go 從這里到哪里。 我最近在 Rails 5 上升級到 Ruby 和 Ruby 2.7.0,不知道是否相關。
嘗試將module ClassMethods
替換為class_methods do
。
如果有效,請記住:
filter
方法來自Ruby。 它在Array
中定義。 正如您在 文檔中看到的那樣, Array
上的filter
方法不帶任何參數。 這是您看到的錯誤的直接原因。
在 Rails 中,當在ActiveRecord
object (在您的情況下為Post.published_until_now
)上調用Array
上的方法並且在 Z20F35E630DAF44DBFA4C3F68F5399D8 上找不到方法時,它會自動將自身轉換為Array
。 因此,它在Array
上調用filter
方法。 通常,您不想定義諸如filter
之類的令人困惑的方法。
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