> For the complete documentation index, see [llms.txt](https://docs.invana.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.invana.io/products/python-api/modelling-using-ogm.md).

# Modelling using OGM

### Create Vertex Model

```python
from invana.ogm import models, fields


graph = InvanaGraph("ws://megamind-ws:8182/gremlin", traversal_source="g")


class Project(models.VertexModel):
    graph = graph
    properties = {
        'name': fields.StringProperty(max_length=10, trim_whitespaces=True),
        'description': fields.StringProperty(allow_null=True, min_length=10),
        'rating': fields.FloatProperty(allow_null=True),
        'is_active': fields.BooleanProperty(default=True),
        'created_at': fields.DateTimeProperty(default=lambda: datetime.now())
    }
 
```