bsp name), the map will be automatically marked for download by clients, just like resource.AddWorkshop does. If your server is running a map that is also in the server's collection (by. The server will download the collection at startup and mount all the downloaded addons. New Cypher Features Inspired by GraphQL Ī Comprehensive Guide to Cypher Map Projection was originally published in Neo4j Developer Blog on Medium, where people are continuing the conversation by highlighting and responding to this story.Dedicated servers can install addons straight from workshop collections, but it requires an addition to the startup parameter.That’s all folks! I hope this helped you better understand what map projection is and when it can be useful! References

Feel free to adapt the example for a multiple category case, for instance by changing the type of Product.cateogry to list. NB: in the previous example, I considered a product belongs to only one category, for the sake of simplicity. With the following Product model containing information about the category it belongs to, you can use map projection in the get_products function in order to build Product objects with all their fields: Here is an example graph schema featuring products and categories: Product/category graph schema - built with You can even imagine having a graph schema different from your “domain” schema, and still building proper objects thanks to map projection. But another application of this concept that I like is the ability to write “Object-Graph mappers” (OGM) in an easy way. I introduced map projection in a GraphQL context, making it easier to take full advantage of GraphQL queries by fetching only the required fields from the database (they do not have to transition through another layer of filtering in your backend). The final selector lets us return only the first three actors, sorted by date of birth. It lets you write very precise pattern matching queries like: MATCH (movie:Movie )

Cypher is a visual graph query language used by the Neo4j graph database.

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