Rails ：活动记录地址数组中的唯一地址
Rails : Unique address from array of active record addresses
如何检索具有相同纬度和经度的唯一地址
> addresses
=> [#<Address id: 10, country: "IN", state: "KA", latitude: "12.971513803339702", longitude: "77.59443104418949", user_id: 11>, #<Address id: 9, country: "IN", state: "KA", latitude: "12.971513803339702", longitude: "77.59443104418949", user_id: 10>]
在这种情况下，我需要任何一个 ActiveRecord，因为纬度和经度具有相似的值。
您可以按经纬度对地址进行分组，然后 select 至少包含 2 个地址的组：
addresses.
group_by { |address| [address.latitude, address.longitude] }.
select { |location, addresses| addresses.size >= 2 }.
keys
根据您的用例，您可能想要使用 distinct（请注意，您会丢失 id 和 user_id 信息）：
Address.select(:country, :state, :latitude, :longitude).distinct
如何检索具有相同纬度和经度的唯一地址
> addresses
=> [#<Address id: 10, country: "IN", state: "KA", latitude: "12.971513803339702", longitude: "77.59443104418949", user_id: 11>, #<Address id: 9, country: "IN", state: "KA", latitude: "12.971513803339702", longitude: "77.59443104418949", user_id: 10>]
在这种情况下，我需要任何一个 ActiveRecord，因为纬度和经度具有相似的值。
您可以按经纬度对地址进行分组，然后 select 至少包含 2 个地址的组：
addresses.
group_by { |address| [address.latitude, address.longitude] }.
select { |location, addresses| addresses.size >= 2 }.
keys
根据您的用例，您可能想要使用 distinct（请注意，您会丢失 id 和 user_id 信息）：
Address.select(:country, :state, :latitude, :longitude).distinct