问题
/local/rvm/gems/ruby-1.9.2-p320/gems/activerecord-sqlserver-adapter-3.2.12/lib/active_record/connection_adapters/sqlserver_adapter.rb:455:in `initialize': IM002 (0) [unixODBC][Driver Manager]Data source name not found, and no default driver specified (ODBC::Error)
I have working copy of my app but suddenly overnight I left my system like that and this error started surfacing. Can anyone tell how to fix this one please?
回答1:
There is no definitive answer to your question since you gave us nothing to work on.
However, the possible reasons for this are:
the DSN you specified could not be found in your user or system odbc.ini files Run odbcinst -j to find where those files are Has someone changed/removed them?
You set ODBCINI env var or ODBCSYSINI env var to point unixODBC at the location of your odbc.ini and odbcinst.ini files and now they are not set (or changed).
Someone has removed or moved your ODBC driver
You normally run your code as user A and now you are running it as user B and you are using user datasources or set ODBCINI env var.
... probably others but if you'd given us better information we wouldn't have to guess.
回答2:
You should start by setting up and configuring FreeTDS. Here is a sample configurations from my files, but I'm sure other variants will work also. One difference is that I'm using Django, but the result below still worked eventually, but it works much better with SQL authentication than with Windows Authentication.
From /etc/freetds/freetds.conf (use the IP of the server if DNS is not active for the server name).
# A typical Microsoft server
[MyServer]
host = 10.0.0.10\path
port = 1433
tds version = 7.0
From /etc/odbcinst.ini
[FreeTDS]
Description = FreeTDS
Driver = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so
From /etc/odbc.ini
[ServerDSN]
Description = "Some Description"
Driver = FreeTDS
ServerName = MyServer
Server = ip_address
Port = 1433
Database = DBNAME
Then this command connects me to the database.
tsql -S MyServer -U username@servername -P password
回答3:
just a tip, in my case was not possible with Driver = FreeTDS and both variables "servername" and "server" in odbc.ini. I let only "server = ip" and "Driver = /usr/lib/i386-linux-gnu/odbc/libtdsodbc.so", worked fine.
来源：https://stackoverflow.com/questions/21237678/how-to-fix-the-unixodbcdriver-managerdata-source-name-not-found-and-no-defa