Ruby on Rails-根據查詢在數據庫中搜索

Question

我有一個簡單的表單，可以在其中設置要瀏覽的查詢，例如panasonic viera 。 這是關於我如何在數據庫中搜索術語的方法：

Product.where("name ilike ?", "%#{params[:q]}%").order('price')

查詢看起來像％panasonic viera％ ，但是我需要以這種方式搜索查詢： ％panasonic％viera％ -我需要找到所有產品，標題中的單詞panasonic或viera ...在哪里 ，但是如何制作這個查詢？

Answer 1

一種解決方案是將查詢分解為單獨的術語，並建立一組通過OR連接的數據庫查詢。

terms = params[:q].split
query = terms.map { |term| "name like '%#{term}%'" }.join(" OR ")
Product.where(query).order('price')

Answer 2

如果您使用的是PostgreSQL，則可以使用pg_search gem。 它支持全文搜索，並帶有any_word選項：

Setting this attribute to true will perform a search which will return all models containing any word in the search terms.

來自pg_search示例：

class Number < ActiveRecord::Base
  include PgSearch
  pg_search_scope :search_any_word,
                  :against => :text,
                  :using => {
                    :tsearch => {:any_word => true}
                  }

  pg_search_scope :search_all_words,
                  :against => :text
end

one = Number.create! :text => 'one'
two = Number.create! :text => 'two'
three = Number.create! :text => 'three'

Number.search_any_word('one two three') # => [one, two, three]
Number.search_all_words('one two three') # => []

Answer 3

如何通過ARel

def self.search(query)
  words      = query.split(/\s+/)
  table      = self.arel_table
  predicates = []

  words.each do |word|
    predicates << table[:name].matches("%#{word}%")
  end

  if predicates.size > 1
    first = predicates.shift
    conditions = Arel::Nodes::Grouping.new(predicates.inject(first) {|memo, expr| Arel::Nodes::Or.new(memo, expr)})
  else
    conditions = predicates.first
  end

  where(conditions).to_a
end

Answer 4

這不行嗎？

 WHERE name LIKE "panasonic" OR name LIKE "viera"