I'm using Yii Framework to create my project. I need to export some data from MySQL (my project) to an external Microsoft SQL server which is on the same network.
Basically, the user needs to click on a button (which will do the export-insert) in my view and the results should be displayed - Success (if the query has been successful) or Failure (if something went wrong).
The results part is quite easy as I'll be using 'setFlash' to display the appropriate message but I want to know how to insert data into an external database through Yii.
Do you have any idea how this can be done?
Well, I agree with #SuVeRa on the first part of defining two db instances in the config.php but i don't think the sql Commands part is necessary (Plus i hate writing sql :D )
Instead you can do:
class SomeModel extends CActiveRecord
{
...
// Override the getDbConnection() function to use the ms sql db connection
public function getDbConnection()
{
return Yii::app()->ms_sql_db_connection; // The name of the connection in config.php
}
public function transfer()
{
// Here you can do all the transferring logic using normal Yii Active Record functions
}
}
Check out the docs on getDbConnection().
Related
I am attempting to use multiple datasources in a Grails 2.4.4 project. According to the docs, this should be possible:
http://www.grails.org/doc/2.4.4/guide/conf.html#multipleDatasources
My primary dataSource (the one I want to use for all domain classes) is using H2 at the moment, as configured by the default DataSource.groovy configuration. My second, read-only datasource is SQL Server, and I tried to declare it as follows at the top level of my DataSource.groovy config (shared by all environments):
ds {
pooled = true
dialect = "org.hibernate.dialect.SQLServer2008Dialect"
driverClassName = "net.sourceforge.jtds.jdbc.Driver"
url = "jdbc:jtds:sqlserver://myserver:1433/mydb;domain=mydomain;useNTLMv2=true;user=myuser"
dbCreate = "none"
}
(Don't let the URL throw you off - I'm just having to use Windows Auth with JTDS. I've tested this via third-party clients as well.)
I inject this into my service class and use it, and everything appears to hook up well:
def dataSource_ds
def serviceMethod(){
Sql ds = new Sql(dataSource_ds)
String query = "SELECT ... "
def results = ds.rows(query)
println "Results are ${results.size()}"
return "Some value"
}
But when I try to access this from an IntegrationSpec-backed Integration Test, I noticed that I was getting "schema not found" errors for valid schemas referred to by my query string, such as "dbo". And the stack trace of any errors from this setup looks like this:
org.h2.jdbc.JdbcSQLException: Schema "DBO" not found; SQL statement:
...
at org.h2.message.DbException.getJdbcSQLException(DbException.java:329)
at org.h2.message.DbException.get(DbException.java:169)
at org.h2.message.DbException.get(DbException.java:146)
at org.h2.command.Parser.readTableOrView(Parser.java:4774)
at org.h2.command.Parser.readTableFilter(Parser.java:1083)
at org.h2.command.Parser.parseSelectSimpleFromPart(Parser.java:1689)
at org.h2.command.Parser.parseSelectSimple(Parser.java:1796)
at org.h2.command.Parser.parseSelectSub(Parser.java:1683)
at org.h2.command.Parser.parseSelectUnion(Parser.java:1526)
at org.h2.command.Parser.parseSelect(Parser.java:1514)
at org.h2.command.Parser.parsePrepared(Parser.java:404)
at org.h2.command.Parser.parse(Parser.java:278)
at org.h2.command.Parser.parse(Parser.java:250)
at org.h2.command.Parser.prepareCommand(Parser.java:217)
at org.h2.engine.Session.prepareLocal(Session.java:414)
at org.h2.engine.Session.prepareCommand(Session.java:363)
...
Now why would THIS datasource be trying to use the H2 driver?
In case it's relevant, my Integration test looks like this:
void "serviceMethod" () {
when: "service method is called"
String response = myService.serviceMethod()
then: "we should get the appropriate text back"
response.equals("Some value")
}
If, in the Service class, I hard-code the connection using a constructor of the Groovy Sql object, the integration test works fine, and any stack traces go through the JTDS driver.But when I try to use the injected datasource, things are strange.
Any idea what I'm doing wrong here?
Just to close the loop on this and hopefully save someone pain on this oversight in the future:
Grails uses an in-memory database when running tests. Make sure to read up on the other differences between integration tests and production here:
http://www.grails.org/doc/latest/guide/testing.html#integrationTesting
This feature makes the use of external (read-only) datasources during any tests pretty interesting, but some of that is to be expected (a test which depends on an external datasource is not a very good test in the long run). I hope to refactor my app and its testing approach at some point (e.g., to use a simple DAO and mock that during the test), because I don't really care about asserting the contents of the external datasource from my app's tests.
Our team's application development involves using Effort Testing Tool to mock our Entity Framework's DbContext. However, it seems that Effort Testing Tool needs to be see the actual SQL Server Database that the application uses in order to mock our Entity Framework's DbContext which seems to going against proper Unit Testing principles.
The reason being that in order to unit test our application code by mocking anything related to Database connectivity ( for example Entity Framework's DbContext), we should Never need a Database to be up and running.
How would I configure Effort Testing Tool to mock Entity Framework's DbContext withOut the actual SQL Server Database up and running?
*
Update:
#gert-arnold We are using Entity Framework Model First approach to implement the back-end model and database.
The following excerpt is from the test code:
connection = Effort.EntityConnectionFactory.CreateTransient("name=NorthwindModel");
jsAudtMppngPrvdr = new BlahBlahAuditMappingProvider();
fctry = new BlahBlahDataContext(jsAudtMppngPrvdr, connection, false);
qryCtxt = new BlahBlahDataContext(connection, false);
audtCtxt = new BlahBlahAuditContext(connection, false);
mockedReptryCtxt = new BlahBlahDataContext(connection, false);
_repository = fctry.CreateRepository<Account>(mockedReptryCtxt, null);
_repositoryAccountRoleMaps = fctry.CreateRepository<AccountRoleMap>(null, _repository);
The "name=NorthwindModel" pertains to our edmx file which contains information about our Database tables
and their corresponding relationships.
If I remove the "name=NorthwindModel" by making the connection like the following line of code, I get an error stating that it expects an argument:
connection = Effort.EntityConnectionFactory.CreateTransient(); // throws error
Could you please explain how the aforementioned code should be rewritten?
You only need that connection string because Effort needs to know where the EDMX file is.
The EDMX file contains all information required for creating an inmemory store with an identical schema you have in your database. You have to specify a connection string only because I thought it would be convenient if the user didn't have to mess with EDMX paths.
If you check the implementation of the CreateTransient method you will see that it merely uses the connection string to get the metadata part of it.
public static EntityConnection CreateTransient(string entityConnectionString, IDataLoader dataLoader)
{
var metadata = GetEffortCompatibleMetadataWorkspace(ref entityConnectionString);
var connection = DbConnectionFactory.CreateTransient(dataLoader);
return CreateEntityConnection(metadata, connection);
}
private static MetadataWorkspace GetEffortCompatibleMetadataWorkspace(ref string entityConnectionString)
{
entityConnectionString = GetFullEntityConnectionString(entityConnectionString);
var connectionStringBuilder = new EntityConnectionStringBuilder(entityConnectionString);
return MetadataWorkspaceStore.GetMetadataWorkspace(
connectionStringBuilder.Metadata,
metadata => MetadataWorkspaceHelper.Rewrite(
metadata,
EffortProviderConfiguration.ProviderInvariantName,
EffortProviderManifestTokens.Version1));
}
I am having issues attempting to connect to two different databases in one Qt Application. I have my information database that stores all the information collected by the application and the new Log database which allows me to track all the changes that occur to the Application, button presses, screen loads etc, for easy debugging after its release. Separately, the databases work perfectly, but when I try to use both of them, only one will work. I read that this could be because I wasn't naming the connections and obviously only the most recently connected database could use the default connection. However when I give the databases names they wont work at all, isOpen() will return true on both, but as soon as they attempt to execute a query I get the errors
"QSqlQuery::prepare: database not open"
"QSqlError(-1, "Driver not loaded", "Driver not loaded")"
My two database declarations are:
database_location = filepath.append("/logger.sqlite");
logDB = QSqlDatabase::addDatabase("QSQLITE", "LoggerDatabaseConnection");
logDB.setHostName("localhost");
logDB.setDatabaseName(database_location);
for the Logger Database connection and :
database_location = filepath.append("/db.sqlite");
db = QSqlDatabase::addDatabase("QSQLITE", "NormalDB");
db.setHostName("localhost");
db.setDatabaseName(database_location);
Also when I am running the first query on the databases to see if their tables exist I am using
QSqlQuery query("LoggerDatabaseConnection");
and likewise for the normal database, but I am still getting connection issues even after declaring the database connection to run the query on.
The database used for the application is declared as a static QSqlDatabase in a namespace to create a global effect, so everyone can access it, that was a previous programmer, and I created the Log database as Singleton with a private database connection. Like I said both versions of the code work separately but when they are together they are fighting each other. I know there is a huge debate over the proper design of Singleton vs Dependecy Injection, but again the code works separately so I am happy with how it is designed for now. If there is any missing information or if you have any ideas, please let me know. Thank you.
QSqlQuery query("LoggerDatabaseConnection");
The first parameter of the constructor is the query, not the connection name. It will use the default connection since you specified no database object.
Try something like this:
QSqlQuery query1("YourFirstQuery", db);
QSqlQuery query2("YourSecondQuery", logDB);
Important: Also do not forget to open and close the database before / after using it by calls to QSqlDatabase::open() and QSqlDatabase::close().
The correct way to have multiple databases is to not use the pointer returned from the static addConnection method. You should use the connectionName argument:
https://doc.qt.io/qt-5/qsqldatabase.html#addDatabase-1 during initilization and query usage:
example:
void MyClass::initDb(QString dbPath, QString connName)
{
// initial db usage, etc
QSqlDatabase db = QSqlDatabase::addDatabase(YOUR_DRIVER, connName);
db.setDatabaseName(dbPath);
// open it, etc
}
void MyClass::updateThing(QString val, QString name, QString connName)
{
QString q = QString("UPDATE THINGS SET val=%1 WHERE name=%2").arg(val, name);
// add the reference to your database via the connection name
QSqlDatabase db = QSqlDatabase::database(connName);
QSqlQuery query(db);
query.exec(q);
// handle the query normally, etc
}
I'm creating a rptlibrary to share with all the reports in my company.
The library has an oda datasource created and shared to all reports. We want to do some querys from ReportEventAdapter.initialize() to the database to get information from the database. I can acces the datasource in the library in this way:
ReportDesignHandle rdh = (ReportDesignHandle)reportContext.getReportRunnable().getDesignHandle();
DesignSessionImpl ds = rdh.getModule().getSession();
String rsf = ds.getResourceFolder( );
LibraryHandle libhan = ds.openLibrary(rsf + "/my.rptlibrary" ).handle( );
DataSourceHandle datasource = libhan.findDataSource("myDS");
But once I have the datasource, there's no way to get a connection to the database from the datasource. The only way to do this, is creating a classic JDBC connection to the database using the data from the datasource? Is there any way to use a more elegant method to connect to the database from the java handler? Like using pooling, reusing the connection, etc..
Thanks.
We can iterate over dataset values in a report script event, thus if a dataset is defined with a JNDI URL, queries can take advantage of a connection pool.
However it is quite complicated. There is a full example in this topic: the script defined in "getDefaultValueList" event of the report parameter can be moved anywhere in the report and then initialize a global variable. In particular we could move it to "initialize" event, or to "beforeFactory" event (in your case "beforeFactory" is probably what you want).
Is it possible to change the connection string of a published sql reporting services report? I can see the binary field called DataSource in the ReportServer database, but since it's stored as binary I don't think it's easily updatable.
Do I need to republish the report with the correct data source? I'm hoping not since I do not want to have to install VS2003.
EDIT: The client is running SQL Server 2000 Reporting Services with all of the service packs installed.
SQL Reporting Services 2000 has a [web service](http://msdn.microsoft.com/en-us/library/aa274396(SQL.80).aspx) that you can use to change the data source. Given that, the following, allows for changing of a data source to a shared data source. This was [adapted from MSDN](http://msdn.microsoft.com/en-us/library/aa225896(SQL.80).aspx).
// Create our reporting services class
ReportingService theRS = new ReportingService();
theRS.Credentials = System.Net.CredentialCache.DefaultCredentials;
// We need to setup a data source reference to an existing shared data source
DataSourceReference theDSRef = new DataSourceReference();
theDSRef.Reference = "/Path/To/ExistingSharedDataSource";
DataSource[] theDSArray = new DataSource[1];
DataSource theDS = new DataSource();
theDS.Item = (DataSourceReference)theDSRef;
theDS.Name = "NameOfSharedDataSource";
theDSArray[0] = theDS;
try
{
// Attempt to change the data source of the report
theRS.SetReportDataSources("/Path/To/ReportName", theDSArray);
Console.Out.WriteLine("We have changed the data source");
}
catch (System.Web.Services.Protocols.SoapException e)
{
Console.Out.WriteLine(e.Message);
Console.Out.WriteLine(e.Detail.InnerXml.ToString());
}
In this example, the ReportingService class is taken from the Proxy class that I generated to talk to the web service, which is described [here](http://msdn.microsoft.com/en-us/library/aa256607(SQL.80).aspx).
I hope this helps some. Let me know if you're looking for something different.