PG::UndefinedFile: 錯誤：無法打開擴展控制文件

Question

升級 Postgres 后，當我嘗試遷移數據庫時出現以下錯誤。

enable_extension(:postgis)
  SQL (17.2ms)  CREATE EXTENSION IF NOT EXISTS "postgis"
PG::UndefinedFile: ERROR:  could not open extension control file "/usr/local/Cellar/postgresql/9.4.5/share/postgresql/extension/postgis.control": No such file or directory
: CREATE EXTENSION IF NOT EXISTS "postgis"
   (0.3ms)  ROLLBACK
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:

PG::UndefinedFile: ERROR:  could not open extension control file "/usr/local/Cellar/postgresql/9.4.5/share/postgresql/extension/postgis.control": No such file or directory
: CREATE EXTENSION IF NOT EXISTS "postgis"/Users/harshamv/Sites/clink/db/migrate/20150812164615_enable_postgis.rb:3:in `change'
-e:1:in `<main>'
ActiveRecord::StatementInvalid: PG::UndefinedFile: ERROR:  could not open extension control file "/usr/local/Cellar/postgresql/9.4.5/share/postgresql/extension/postgis.control": No such file or directory
: CREATE EXTENSION IF NOT EXISTS "postgis"
/Users/harshamv/Sites/clink/db/migrate/20150812164615_enable_postgis.rb:3:in `change'
-e:1:in `<main>'
PG::UndefinedFile: ERROR:  could not open extension control file "/usr/local/Cellar/postgresql/9.4.5/share/postgresql/extension/postgis.control": No such file or directory
/Users/harshamv/Sites/clink/db/migrate/20150812164615_enable_postgis.rb:3:in `change'
-e:1:in `<main>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

不知道從哪里開始。 大多數其他問題似乎與 Linux 有關，當我嘗試創建符號鏈接時它也不起作用。

Answer 1

你應該安裝 postgresql-9.4-postgis-2.1

Answer 2

對於 MacOS，使用以下命令安裝 postgis 對我有用：

brew install postgis

對於 Ubuntu，以下命令有效：

sudo apt install postgresql-10-postgis-scripts

Answer 3

檢測可用的 postgresql postgis 版本

sudo apt-cache search postgis

安裝

sudo apt install postgresql-12-postgis-3-scripts 

切換 postgres 用戶

sudo -i -u postgres

創建一個數據庫，然后連接它。 在此之后運行 postgis 擴展激活命令

CREATE EXTENSION postgis;

稍后您可以通過以下方式檢查並驗證它

SELECT PostGIS_version();