最初,我要使用这样一个路线:
www.example.com/users/3
用户识别码为3,然后通过索引编制,我们可以从具有奥(1)复杂性的非洲开发银行检索用户信息。
But I have changed the route to replace user name instead of Id like so :
www.example.com/users/john
现在搜索的复杂性是O(n)。 是否有可能在这里进行优化,以获得O(1)?
最初,我要使用这样一个路线:
www.example.com/users/3
用户识别码为3,然后通过索引编制,我们可以从具有奥(1)复杂性的非洲开发银行检索用户信息。
But I have changed the route to replace user name instead of Id like so :
www.example.com/users/john
现在搜索的复杂性是O(n)。 是否有可能在这里进行优化,以获得O(1)?
When you pass the user_id
, the query will be
User.find_by(id: user_id)
当您通过<代码>用户_ 姓名时,将查询。
User.find_by(user_name: user_name)
它并不涉及<条码>铁路/条码>,而是涉及<条码>。 DB
页: 1
def change
add_index :users, :user_name
end
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