How to achieve filtering?

Hi,

It would be good if graphene mongo had support for filters. For example query { allPersons(filter: { age_gt: 18 }) { firstName lastName } } Is there any other way to achieve this or fire a query like thin in graphene-mongo?

[dscso]

Hello, I have had the same issue and I solved it by creating a filter class like this (It even got pagination 😱): models.py

class Product(db.DynamicDocument):
    name = db.StringField(required=True)
    tags = db.ListField(db.StringField())
    ...

And the schema

class ProductSchema(MongoengineObjectType):
    class Meta:
        description = "Products"
        model = models.Product
        connection_class = ExtendedConnection
        interfaces = (Node,)


class ProductFilter(graphene.InputObjectType):
    name = graphene.String()
    name__icontains = graphene.String(name="name_icontains")
    tags__in = graphene.List(graphene.String, name="tags_in", description="Product has to have ONE of the provided tags")
    tags__all = graphene.List(graphene.String, name="tags_all", description="Product has to have all provided tags")


class QueryProductsSchema(graphene.ObjectType):
    total_count = graphene.Int()
    total_pages = graphene.Int()
    products = graphene.List(ProductSchema)


class Query(graphene.ObjectType):
    class Meta():
        description = "Root Query"

    query_products = graphene.Field(QueryProductsSchema, first=graphene.Int(), offset=graphene.Int(), filters=ProductFilter())

    def resolve_query_products(self, info, **kwargs):
        query = models.Product.objects(**kwargs.get("filters", {}))
        pagination = query.paginate(kwargs.get("offset", 1), kwargs.get("first", 20))

        return QueryProductsSchema(total_count=pagination.total, total_pages=pagination.pages,
                                   products=pagination.items)

Example Query:

{
  queryProducts(first: 2, offset: 1, filters: {
    tags_in: ["ww"],
    name_icontains: "hähnchen"
  }) {
    totalCount
    totalPages
    products {
      name
      tags
    }
  }
}

To define what field should be querried like what you have to name the fields in the ProductFilter class according to your needs (http://docs.mongoengine.org/guide/querying.html) Maybe a bit late I know but maybe it helps someone

[riverfr0zen]

I’ve been working on filtering stuff with graphene-mongo. It’s very early work (wasn’t planning to put it up till later), so full disclaimers, etc. etc. but you can check it out here (python 3 only):

https://github.com/riverfr0zen/graphene-mongo-extras

Since there isn’t much documentation yet, I also put up a repo with an example flask app that shows you how the queries might look: https://github.com/riverfr0zen/graphene-mongo-extras-examples