commit 78135453a2337d11a6af2089ff8b1c23d9234278
Author: collerek <collerek@gmail.com>
Date:   Sun Aug 2 08:41:38 2020 +0200

    initial commit

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+p38venv
+.idea
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+# ORM
+
+<p>
+<a href="https://travis-ci.org/encode/orm">
+    <img src="https://travis-ci.org/encode/orm.svg?branch=master" alt="Build Status">
+</a>
+<a href="https://codecov.io/gh/encode/orm">
+    <img src="https://codecov.io/gh/encode/orm/branch/master/graph/badge.svg" alt="Coverage">
+</a>
+<a href="https://pypi.org/project/orm/">
+    <img src="https://badge.fury.io/py/orm.svg" alt="Package version">
+</a>
+</p>
+
+The `async-orm` package is an async ORM for Python, with support for Postgres,
+MySQL, and SQLite. ORM is built with:
+
+* [SQLAlchemy core][sqlalchemy-core] for query building.
+* [`databases`][databases] for cross-database async support.
+* [`pydantic`][pydantic] for data validation.
+
+Because ORM is built on SQLAlchemy core, you can use Alembic to provide
+database migrations.
+
+**ORM is still under development: We recommend pinning any dependencies with `orm~=0.1`**
+
+**Note**: Use `ipython` to try this from the console, since it supports `await`.
+
+```python
+import databases
+import orm
+import sqlalchemy
+
+database = databases.Database("sqlite:///db.sqlite")
+metadata = sqlalchemy.MetaData()
+
+
+class Note(orm.Model):
+    __tablename__ = "notes"
+    __database__ = database
+    __metadata__ = metadata
+
+    id = orm.Integer(primary_key=True)
+    text = orm.String(max_length=100)
+    completed = orm.Boolean(default=False)
+
+# Create the database
+engine = sqlalchemy.create_engine(str(database.url))
+metadata.create_all(engine)
+
+# .create()
+await Note.objects.create(text="Buy the groceries.", completed=False)
+await Note.objects.create(text="Call Mum.", completed=True)
+await Note.objects.create(text="Send invoices.", completed=True)
+
+# .all()
+notes = await Note.objects.all()
+
+# .filter()
+notes = await Note.objects.filter(completed=True).all()
+
+# exact, iexact, contains, icontains, lt, lte, gt, gte, in
+notes = await Note.objects.filter(text__icontains="mum").all()
+
+# .get()
+note = await Note.objects.get(id=1)
+
+# .update()
+await note.update(completed=True)
+
+# .delete()
+await note.delete()
+
+# 'pk' always refers to the primary key
+note = await Note.objects.get(pk=2)
+note.pk  # 2
+```
+
+ORM supports loading and filtering across foreign keys...
+
+```python
+import databases
+import orm
+import sqlalchemy
+
+database = databases.Database("sqlite:///db.sqlite")
+metadata = sqlalchemy.MetaData()
+
+
+class Album(orm.Model):
+    __tablename__ = "album"
+    __metadata__ = metadata
+    __database__ = database
+
+    id = orm.Integer(primary_key=True)
+    name = orm.String(max_length=100)
+
+
+class Track(orm.Model):
+    __tablename__ = "track"
+    __metadata__ = metadata
+    __database__ = database
+
+    id = orm.Integer(primary_key=True)
+    album = orm.ForeignKey(Album)
+    title = orm.String(max_length=100)
+    position = orm.Integer()
+
+
+# Create some records to work with.
+malibu = await Album.objects.create(name="Malibu")
+await Track.objects.create(album=malibu, title="The Bird", position=1)
+await Track.objects.create(album=malibu, title="Heart don't stand a chance", position=2)
+await Track.objects.create(album=malibu, title="The Waters", position=3)
+
+fantasies = await Album.objects.create(name="Fantasies")
+await Track.objects.create(album=fantasies, title="Help I'm Alive", position=1)
+await Track.objects.create(album=fantasies, title="Sick Muse", position=2)
+
+
+# Fetch an instance, without loading a foreign key relationship on it.
+track = await Track.objects.get(title="The Bird")
+
+# We have an album instance, but it only has the primary key populated
+print(track.album)       # Album(id=1) [sparse]
+print(track.album.pk)    # 1
+print(track.album.name)  # Raises AttributeError
+
+# Load the relationship from the database
+await track.album.load()
+assert track.album.name == "Malibu"
+
+# This time, fetch an instance, loading the foreign key relationship.
+track = await Track.objects.select_related("album").get(title="The Bird")
+assert track.album.name == "Malibu"
+
+# Fetch instances, with a filter across an FK relationship.
+tracks = Track.objects.filter(album__name="Fantasies")
+assert len(tracks) == 2
+
+# Fetch instances, with a filter and operator across an FK relationship.
+tracks = Track.objects.filter(album__name__iexact="fantasies")
+assert len(tracks) == 2
+
+# Limit a query
+tracks = await Track.objects.limit(1).all()
+assert len(tracks) == 1
+```
+
+## Data types
+
+The following keyword arguments are supported on all field types.
+
+* `primary_key`
+* `allow_null`
+* `default`
+* `index`
+* `unique`
+
+All fields are required unless one of the following is set:
+
+* `allow_null` - Creates a nullable column. Sets the default to `None`.
+* `allow_blank` - Allow empty strings to validate. Sets the default to `""`.
+* `default` - Set a default value for the field.
+
+* `orm.String(max_length)`
+* `orm.Text()`
+* `orm.Boolean()`
+* `orm.Integer()`
+* `orm.Float()`
+* `orm.Date()`
+* `orm.Time()`
+* `orm.DateTime()`
+* `orm.JSON()`
+
+[sqlalchemy-core]: https://docs.sqlalchemy.org/en/latest/core/
+[databases]: https://github.com/encode/databases
+[pydantic]: https://pydantic-docs.helpmanual.io/
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