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Use SQLAlchemy ORMs to Access SAP Concur Data in Python

The CData Python Connector for SAP Concur enables you to create Python applications and scripts that use SQLAlchemy Object-Relational Mappings of SAP Concur data.

The rich ecosystem of Python modules lets you get to work quickly and integrate your systems effectively. With the CData Python Connector for SAP Concur and the SQLAlchemy toolkit, you can build SAP Concur-connected Python applications and scripts. This article shows how to use SQLAlchemy to connect to SAP Concur data to query, update, delete, and insert SAP Concur data.

With built-in optimized data processing, the CData Python Connector offers unmatched performance for interacting with live SAP Concur data in Python. When you issue complex SQL queries from SAP Concur, the CData Connector pushes supported SQL operations, like filters and aggregations, directly to SAP Concur and utilizes the embedded SQL engine to process unsupported operations client-side (often SQL functions and JOIN operations).

Connecting to SAP Concur Data

Connecting to SAP Concur data looks just like connecting to any relational data source. Create a connection string using the required connection properties. For this article, you will pass the connection string as a parameter to the create_engine function.

SAP Concur uses the OAuth 2 authentication standard. You will need to obtain the OAuthClientId and OAuthClientSecret by registering an app with SAP Concur. See the Getting Started section of the help documentation for an authentication guide.

Follow the procedure below to install SQLAlchemy and start accessing SAP Concur through Python objects.

Install Required Modules

Use the pip utility to install the SQLAlchemy toolkit:

pip install sqlalchemy

Be sure to import the module with the following:

import sqlalchemy

Model SAP Concur Data in Python

You can now connect with a connection string. Use the create_engine function to create an Engine for working with SAP Concur data.

engine = create_engine("sapconcur///?OAuthClientId=MyOAuthClientId&OAuthClientSecret=MyOAuthClientSecret&InitiateOAuth=GETANDREFRESH&OAuthSettingsLocation=/PATH/TO/OAuthSettings.txt")

Declare a Mapping Class for SAP Concur Data

After establishing the connection, declare a mapping class for the table you wish to model in the ORM (in this article, we will model the Departments table). Use the sqlalchemy.ext.declarative.declarative_base function and create a new class with some or all of the fields (columns) defined.

base = declarative_base()
class Departments(base):
	__tablename__ = "Departments"
	Id = Column(String,primary_key=True)
	OfficeId = Column(String)
	...

Query SAP Concur Data

With the mapping class prepared, you can use a session object to query the data source. After binding the Engine to the session, provide the mapping class to the session query method.

Using the query Method

engine = create_engine("sapconcur///?OAuthClientId=MyOAuthClientId&OAuthClientSecret=MyOAuthClientSecret&InitiateOAuth=GETANDREFRESH&OAuthSettingsLocation=/PATH/TO/OAuthSettings.txt")
factory = sessionmaker(bind=engine)
session = factory()
for instance in session.query(Departments).filter_by(Id="1668776136772254"):
	print("Id: ", instance.Id)
	print("OfficeId: ", instance.OfficeId)
	print("---------")

Alternatively, you can use the execute method with the appropriate table object. The code below works with an active session.

Using the execute Method

Departments_table = Departments.metadata.tables["Departments"]
for instance in session.execute(Departments_table.select().where(Departments_table.c.Id == "1668776136772254")):
	print("Id: ", instance.Id)
	print("OfficeId: ", instance.OfficeId)
	print("---------")

For examples of more complex querying, including JOINs, aggregations, limits, and more, refer to the Help documentation for the extension.

Insert SAP Concur Data

To insert SAP Concur data, define an instance of the mapped class and add it to the active session. Call the commit function on the session to push all added instances to SAP Concur.

new_rec = Departments(Id="placeholder", Id="1668776136772254")
session.add(new_rec)
session.commit()

Update SAP Concur Data

To update SAP Concur data, fetch the desired record(s) with a filter query. Then, modify the values of the fields and call the commit function on the session to push the modified record to SAP Concur.

updated_rec = session.query(Departments).filter_by(SOME_ID_COLUMN="SOME_ID_VALUE").first()
updated_rec.Id = "1668776136772254"
session.commit()

Delete SAP Concur Data

To delete SAP Concur data, fetch the desired record(s) with a filter query. Then delete the record with the active session and call the commit function on the session to perform the delete operation on the provided recoreds (rows).

deleted_rec = session.query(Departments).filter_by(SOME_ID_COLUMN="SOME_ID_VALUE").first()
session.delete(deleted_rec)
session.commit()

Free Trial & More Information

Download a free, 30-day trial of the SAP Concur Python Connector to start building Python apps and scripts with connectivity to SAP Concur data. Reach out to our Support Team if you have any questions.