sqla-filters-yaml : Build filter tree from YAML

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This project is not ready for production so use it carefully because it’s not stable.

YAML Parser

This parser is used to create a filters tree using a yaml file.


For the example we will take a simple entity like the following:

class Post(Base):
    p_id = sa.Column(sa.Integer, primary_key=True)
    title = sa.Column(sa.String(100))
    content = sa.Column(sa.String)

    def __str__(self):
        return '{} | {}'.format(self.title, self.content)

and your YAML looks like:

type: or
- type: operator
    attribute: title
    operator: eq
    value: Post_01
- type: operator
    attribute: title
    operator: eq
    value: Post_03

you can now use sqla-filter to filter your query and get only post with title equal to ‘Post_01’ or ‘Post_02’.

# Create a YAML parser instance
parser = YAMLFiltersParser(raw_yaml_string)

# A tree is generated with the YAML received.
# If you set the YAML the tree is automatically updated.

# Now you can filter a query
query = session.query(Post)
filtered_query = parser.tree.filter(query)

# Get the results
# you can also directly call the `all()` from previous step
# results = filtered_query = parser.tree.filter(query).all()
results = query.all()

Indices and tables