Redis to realize the function of people nearby.

Redis to achieve the function of people nearby, I believe that many inexperienced people do not know what to do, so this paper summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

01

Geo of Redis

Recently, I have been writing to realize this function of people nearby, and I have found a lot of solutions on the Internet, but all of them are not satisfactory. Finally, it is found that redis has implemented this function. Support the storage of geolocation information to achieve nearby locations, shake such functions that depend on geolocation information.

Add geolocation

Geoadd key longitude latitude member

Longitude latitude member is the longitude, latitude and member of the geographic location.

The above picture shows the addition of three geographic locations, namely EE,Xiao,Chui.

03

Get the distance between the two places

Geodist key member1 member2 [unit]

Where unit represents the unit that returns the result, including the following four types:

M (meters) stands for rice.

Km (kilometers) stands for kilometers.

Mi (miles) stands for miles.

Ft (feet) stands for ruler.

The following operations are used to calculate the distance from Tianjin to Beijing in kilometers

The above figure is calculated by Amap, and it is basically consistent.

04

Get a nearby location

Georadiusbymember We use this command here, and the parameters of this command only need to be given the members.

GEORADIUSBYMEMBER company EE 20 km count 3 asc

Here are the members of the acquired 20km near EE

05

Deletion of geographic location

GEO does not provide a command to delete members, but because the underlying implementation of GEO is zset, you can use the zrem command to delete geographic location information.

After reading the above, have you mastered the method of Redis to realize the function of the people nearby? If you want to learn more skills or want to know more about it, you are welcome to follow the industry information channel, thank you for reading!