安装 postgresql 后无法联系 pgAdmin 4 服务器

Question

After installing postgres 13, pgadmin4 cannot launch and this error occur:

The pgAdmin 4 server could not be contacted:

Already tried:

• Run as administrator
• Adding file://C:\Program Files\PostgreSQL\13\bin to path variable
• Cleaning Appdata\roaming\pgadmin
• Restarting computer

The error is still here; here is some details:

 pgAdmin Runtime Environment
--------------------------------------------------------
Python Path: "C:\Program Files\PostgreSQL\13\pgAdmin 4\python\python.exe"
Runtime Config File: "C:\Users\DZ001160\AppData\Roaming\pgadmin\runtime_config.json"
pgAdmin Config File: "C:\Program Files\PostgreSQL\13\pgAdmin 4\web\config.py"
Webapp Path: "C:\Program Files\PostgreSQL\13\pgAdmin 4\web\pgAdmin4.py"
pgAdmin Command: "C:\Program Files\PostgreSQL\13\pgAdmin 4\python\python.exe -s C:\Program Files\PostgreSQL\13\pgAdmin 4\web\pgAdmin4.py"
Environment: 
  - ALLUSERSPROFILE: C:\ProgramData
  - APPDATA: C:\Users\DZ001160\AppData\Roaming
  - ChocolateyInstall: C:\ProgramData\chocolatey
  - CHROME_CRASHPAD_PIPE_NAME: \\.\pipe\crashpad_4904_QRCYSGHVOIEQKPFC
  - CHROME_RESTART: NW.js|NW.js est bloqué. Voulez-vous le relancer maintenant ?|LEFT_TO_RIGHT
  - CommonProgramFiles: C:\Program Files\Common Files
  - CommonProgramFiles(x86): C:\Program Files (x86)\Common Files
  - CommonProgramW6432: C:\Program Files\Common Files
  - COMPUTERNAME: W10-PC0L10T3
  - ComSpec: C:\WINDOWS\system32\cmd.exe
  - DominoAddress: fr-algapppwv001.fr.ema.ad.pwcinternal.com
  - DominoName: DZ-ALGAPP000/DZ/Server/PwC
  - DriverData: C:\Windows\System32\Drivers\DriverData
  - HOMEDRIVE: C:
  - HOMEPATH: \Users\DZ001160
  - LOCALAPPDATA: C:\Users\DZ001160\AppData\Local
  - LOGONSERVER: \\FR-PARDIR002
  - NUMBER_OF_PROCESSORS: 4
  - NVM_HOME: C:\Users\DZ001160-ladm\AppData\Roaming\nvm
  - NVM_SYMLINK: C:\Program Files\nodejs
  - OneDrive: C:\Users\DZ001160\OneDrive
  - OPENSSL_CONF: C:\Program Files\PostgreSQL\psqlODBC\etc\openssl.cnf
  - OS: Windows_NT
  - Path: C:\Program Files (x86)\Zulu\zulu-8-jre\bin\;C:\Program Files\Zulu\zulu-8-jre\bin\;C:\Python39\Scripts\;C:\Python39\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files (x86)\IBM\Notes\;C:\Program Files (x86)\ConfigMgr 2012 Toolkit R2\ClientTools;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\ProgramData\chocolatey\bin;C:\Program Files\dotnet\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;C:\Users\DZ001160-ladm\AppData\Roaming\nvm;C:\Program Files\nodejs;C:\Program Files\nodejs\;C:\Users\DZ001160\AppData\Local\Microsoft\WindowsApps;C:\Users\DZ001160\AppData\Local\Programs\Git\cmd;C:\Users\DZ001160\AppData\Local\Gource\cmd;C:\Users\DZ001160\AppData\Roaming\npm
  - PATHEXT: .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.PY;.PYW
  - PGADMIN_INT_KEY: 446e590b-3ac8-45a1-9d95-611e127071b0
  - PGADMIN_INT_PORT: 53846
  - PGADMIN_SERVER_MODE: OFF
  - POSTGRES: C:\Program Files\PostgreSQL\13\bin
  - PROCESSOR_ARCHITECTURE: AMD64
  - PROCESSOR_IDENTIFIER: Intel64 Family 6 Model 78 Stepping 3, GenuineIntel
  - PROCESSOR_LEVEL: 6
  - PROCESSOR_REVISION: 4e03
  - ProgramData: C:\ProgramData
  - ProgramFiles: C:\Program Files
  - ProgramFiles(x86): C:\Program Files (x86)
  - ProgramW6432: C:\Program Files
  - PROJ_LIB: C:\Program Files\PostgreSQL\13\share\contrib\postgis-3.1\proj
  - PSModulePath: C:\Program Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules;C:\Program Files\Thycotic\Powershell\
  - PUBLIC: C:\Users\Public
  - SESSIONNAME: Console
  - SystemDrive: C:
  - SystemRoot: C:\WINDOWS
  - TEMP: C:\Users\DZ001160\AppData\Local\Temp
  - TMP: C:\Users\DZ001160\AppData\Local\Temp
  - UATDATA: C:\WINDOWS\CCM\UATData\D9F8C395-CAB8-491d-B8AC-179A1FE1BE77
  - USERDNSDOMAIN: FR.EMA.AD.PWCINTERNAL.COM
  - USERDOMAIN: FR
  - USERDOMAIN_ROAMINGPROFILE: FR
  - USERNAME: DZ001160
  - USERPROFILE: C:\Users\DZ001160
  - windir: C:\WINDOWS
--------------------------------------------------------

Traceback (most recent call last):
  File "C:\Program Files\PostgreSQL\13\pgAdmin 4\web\pgAdmin4.py", line 98, in <module>
    app = create_app()
  File "C:\Program Files\PostgreSQL\13\pgAdmin 4\web\pgadmin\__init__.py", line 347, in create_app
    if not os.path.exists(SQLITE_PATH) or get_version() == -1:
  File "C:\Program Files\PostgreSQL\13\pgAdmin 4\web\pgadmin\setup\db_version.py", line 19, in get_version
    return version.value
AttributeError: 'NoneType' object has no attribute 'value'

Answer 1

The solution work for me:

• Deleting C:\Users\ {username}\AppData\Roaming\pgadmin
• Adding C:\Program Files\PostgreSQL\13\bin to the PATH system environment variable
• Download pgAdmin4 at: https://www.postgresql.org/ftp/pgadmin/pgadmin4/v5.2/windows/
• Download Sql server at:
  https://www.enterprisedb.com/downloads/postgres-postgresql-downloads . When setting, uncheck install both pgAdmin 4 and StackBuilder.

Answer 2

I have same the failure. I can't seem to make pgAdmin 4 work. I installed PostgreSQL on a different laptop, pdAdmin 4 comes up, but then there was a different failure.

Answer 3

For those who get error on MacOS, new version of pgAdmin cannot connect to database on old pgAdmin. Workarount for me is just rename folder ~/.pgadmin to something else. Then the new PgAdmin will start successfully.

Note1: use Command + Shift +. shortcut key to show the hidden folder.

Note2: remove ~/.pgadmin result to lose old database connections.