Changes in database and adapter In peewee 1.0 there were two classes that controlled access to the database – the Database subclass and an Adapter. The adapter’s job was to say what features a database backend supported, and how to open a connection. The database was a bit higher-level and its main job was to execute queries and provide metadata about the database, like lists of tables, last insert id, etc. two classes, since inevitably they always went in pairs (e.g. SqliteDatabase/SqliteAdapter). The database class now encapsulates all this functionality. 1.3.5 How the SQL gets made The first thing I started

the database Working with existing databases What next? Example app Running the example Diving into the code More examples Contributing Patches Bugs Questions Database Initializing a Database Using Using Postgresql Using SQLite Using MySQL Connecting using a Database URL Run-time database configuration Dynamically defining a database Connection Management Connection Pooling Testing Peewee Applications with Gevent Framework Integration Executing Queries Managing Transactions Database Errors Logging queries Adding a new Database Driver Models and Fields Fields Creating model tables Model options and

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1.5 Database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . installation by running the test suite. python runtests.py You can test specific features or specific database drivers using the runtests.py script. To view the available test runner options, use: python runtests MySQL you need to create a database named “peewee_test”. To test the Postgres extension module, you will also want to install the HStore extension in the postgres test database: -- install the hstore extension

Managing your Database Creating a database connection and tables Using Postgresql Using SQLite Using BerkeleyDB Using MySQL Connecting using a Database URL Multi-threaded applications Run-time database configuration configuration Dynamically defining a database Connection Pooling Read Slaves Schema migrations Generating Models from Existing Databases Adding Request Hooks Additional connection initialization Advanced Connection Connection Management Using multiple databases Database Errors Automatic Reconnect Logging queries Generating skeleton code Adding a new Database Driver Models and Fields Fields Creating model tables

the database Working with existing databases What next? Example app Running the example Diving into the code More examples Contributing Patches Bugs Questions Database Initializing a Database Using Using Postgresql Using SQLite Using MySQL Connecting using a Database URL Run-time database configuration Dynamically defining a database Connection Management Connection Pooling Testing Peewee Applications with Gevent Framework Integration Executing Queries Managing Transactions Database Errors Logging queries Adding a new Database Driver Models and Fields Fields Creating model tables Model options and

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 1.5 Database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . installation by running the test suite. python runtests.py You can test specific features or specific database drivers using the runtests.py script. To view the available test runner options, use: python runtests MySQL you need to create a database named “peewee_test”. To test the Postgres extension module, you will also want to install the HStore extension in the postgres test database: -- install the hstore extension

Compilation of SQLite Extensions Quickstart Model Definition Storing data Retrieving Data Closing the database Working with existing databases What next? Example app Running the example Diving into the code Aggregation Recursion Database Initializing a Database Using Postgresql Using SQLite Using MySQL Connecting using a Database URL Run-time database configuration Dynamically defining a database Connection Management with Gevent Framework Integration Executing Queries Managing Transactions Database Errors Logging queries Adding a new Database Driver Models and Fields Fields Field-naming conflicts Creating model tables

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 1.6 Database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . installation by running the test suite. python runtests.py You can test specific features or specific database drivers using the runtests.py script. To view the available test runner options, use: python runtests MySQL you need to create a database named “peewee_test”. To test the Postgres extension module, you will also want to install the HStore extension in the postgres test database: -- install the hstore extension

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 1.6 Database . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . installation by running the test suite. python runtests.py You can test specific features or specific database drivers using the runtests.py script. To view the available test runner options, use: python runtests MySQL you need to create a database named “peewee_test”. To test the Postgres extension module, you will also want to install the HStore extension in the postgres test database: -- install the hstore extension

tests Optional dependencies Quickstart Model Definition Storing data Retrieving Data Closing the database Working with existing databases What next? Example app Running the example Diving into the code Aggregation Recursion Database Initializing a Database Using Postgresql Using SQLite Using MySQL Connecting using a Database URL Run-time database configuration Dynamically defining a database Connection Management Applications Framework Integration Executing Queries Managing Transactions Database Errors Logging queries Adding a new Database Driver Models and Fields Fields Creating model tables Model options and