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Linux/UNIX 上のPython からDynamics AX Data にデータ連携。

CData ODBC Driver for Dynamics AX を使って、Linux/UNIX 上のPython アプリケーションからDynamics AX data へのデータ連携が可能になります。Python のpyodbc モジュールを活用しましょう。

豊富なPython のエコシステムでデータ連携が簡単に行えます。 CData Linux/UNIX ODBC Driver for Dynamics AX とpyodbc module を使って、簡単にDynamics AX に連携するPython アプリケーションが構築できます。本記事では、pyodbc のビルトイン機能を使って、Dynamics AX data に接続し、クエリを実行、表示するかを説明します。

CData ODBC Drivers をUNIX/Linux マシンで利用

The CData ODBC Drivers are supported in various Red Hat-based and Debian-based systems, including Ubuntu, Debian, RHEL, CentOS, and Fedora. There are also several libraries and packages that are required, many of which may be installed by default, depending on your system. For more information on the supported versions of Linux operating systems and the required libraries, please refer to the "Getting Started" section in the help documentation (installed and found online).

Installing the Driver Manager

Before installing the driver, check that your system has a driver manager. For this article, you will use unixODBC, a free and open source ODBC driver manager that is widely supported.

For Debian-based systems like Ubuntu, you can install unixODBC with the APT package manager:

$ sudo apt-get install unixODBC unixODBC-dev

For systems based on Red Hat Linux, you can install unixODBC with yum or dnf:

$ sudo yum install unixODBC unixODBC-devel

The unixODBC driver manager reads information about drivers from an odbcinst.ini file and about data sources from an odbc.ini file. You can determine the location of the configuration files on your system by entering the following command into a terminal:

$ odbcinst -j

The output of the command will display the locations of the configuration files for ODBC data sources and registered ODBC drivers. User data sources can only be accessed by the user account whose home folder the odbc.ini is located in. System data sources can be accessed by all users. Below is an example of the output of this command:

DRIVERS............: /etc/odbcinst.ini SYSTEM DATA SOURCES: /etc/odbc.ini FILE DATA SOURCES..: /etc/ODBCDataSources USER DATA SOURCES..: /home/myuser/.odbc.ini SQLULEN Size.......: 8 SQLLEN Size........: 8 SQLSETPOSIROW Size.: 8

Installing the Driver

You can download the driver in standard package formats: the Debian .deb package format or the .rpm file format. Once you have downloaded the file, you can install the driver from the terminal.

The driver installer registers the driver with unixODBC and creates a system DSN, which can be used later in any tools or applications that support ODBC connectivity.

For Debian-based systems like Ubuntu, run the following command with sudo or as root: $ dpkg -i /path/to/package.deb

For Red Hat systems and other systems that support .rpms, run the following command with sudo or as root: $ rpm -i /path/to/package.rpm

Once the driver is installed, you can list the registered drivers and defined data sources using the unixODBC driver manager:

List the Registered Driver(s)

$ odbcinst -q -d CData ODBC Driver for Dynamics AX ...

List the Defined Data Source(s)

$ odbcinst -q -s CData DynamicsAX Source ...

To use the CData ODBC Driver for Dynamics AX with unixODBC, ensure that the driver is configured to use UTF-16. To do so, edit the INI file for the driver (cdata.odbc.dynamicsax.ini), which can be found in the lib folder in the installation location (typically /opt/cdata/cdata-odbc-driver-for-dynamicsax), as follows:

cdata.odbc.dynamicsax.ini

... [Driver] DriverManagerEncoding = UTF-16

Modifying the DSN

The driver installation predefines a system DSN. You can modify the DSN by editing the system data sources file (/etc/odbc.ini) and defining the required connection properties. Additionally, you can create user-specific DSNs that will not require root access to modify in $HOME/.odbc.ini.

To connect to DynamicsAX, specify User, Domain, and ObjectServer. You can also surface tables for a specific Company; when this property is blank, the default company is used.

Alternatively, you can use the .NET Business Connector to connect on behalf of DynamicsAX users. You can obtain the ProxyUser and ProxyDomain properties on the System service accounts form: Click System Administration -> Setup -> System -> System Service Accounts. Additionally, set ProxyPassword.

By default, only transaction data and base information from the TRANSACTION and MAIN table groups is returned. You can specify which groups to return with TableGroups.

Set Language to use the same language you use in your DynamicsAX labels.

/etc/odbc.ini or $HOME/.odbc.ini

[CData DynamicsAX Source] Driver = CData ODBC Driver for Dynamics AX Description = My Description User = MyUser Domain = MyDomain objectserver = MicrosoftDynamicsAX@WIN-1IP52JPQVJS:2712

For specific information on using these configuration files, please refer to the help documentation (installed and found online).

You can follow the procedure below to install pyodbc and start accessing Dynamics AX through Python objects.

pyodbc のインストール

You can use the pip utility to install the module:

pip install pyodbc

Be sure to import with the module with the following:

import pyodbc

Python でのDynamics AX Data への接続

You can now connect with an ODBC connection string or a DSN. Below is the syntax for a connection string:

cnxn = pyodbc.connect('DRIVER={CData ODBC Driver for Dynamics AX};User=MyUser;Domain=MyDomain;objectserver=MicrosoftDynamicsAX@WIN-1IP52JPQVJS:2712;')

Below is the syntax for a DSN:

cnxn = pyodbc.connect('DSN=CData DynamicsAX Sys;')

Execute SQL to Dynamics AX

Instantiate a Cursor and use the execute method of the Cursor class to execute any SQL statement.

cursor = cnxn.cursor()

Select

You can use fetchall, fetchone, and fetchmany to retrieve Rows returned from SELECT statements:

import pyodbc cursor = cnxn.cursor() cnxn = pyodbc.connect('DSN=CData DynamicsAX Source;User=MyUser;Password=MyPassword') cursor.execute("SELECT Name, Qty FROM CustInvoiceTrans WHERE Qty = '2000'") rows = cursor.fetchall() for row in rows: print(row.Name, row.Qty)

You can provide parameterized queries in a sequence or in the argument list:

cursor.execute( "SELECT Name, Qty FROM CustInvoiceTrans WHERE Qty = ?", '2000',1)

Insert

INSERT commands also use the execute method; however, you must subsequently call the commit method after an insert or you will lose your changes:

cursor.execute("INSERT INTO CustInvoiceTrans (Qty) VALUES ('2000')") cnxn.commit()

Update and Delete

As with an insert, you must also call commit after calling execute for an update or delete:

cursor.execute("UPDATE CustInvoiceTrans SET Qty = '2000'") cnxn.commit()

Metadata Discovery

You can use the getinfo method to retrieve data such as information about the data source and the capabilities of the driver. The getinfo method passes through input to the ODBC SQLGetInfo method.

cnxn.getinfo(pyodbc.SQL_DATA_SOURCE_NAME)

You are now ready to build Python apps in Linux/UNIX environments with connectivity to Dynamics AX data, using the CData ODBC Driver for Dynamics AX.

 
 
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