Pagination for indexes does not work

[iisulop]

It seems pagination does not work properly for indexes. When doing scans on tables they do work. The problem appears when trying to paginate using last and again or recursive.

from faker import Faker
import uuid as uuid
from dynamorm import (
    DynaModel,
    GlobalIndex,
    ProjectAll,
)
from marshmallow import fields

faker = Faker()

class BigProblem(DynaModel):
    class Table:
        name = 'example_big_query_problem_table_1'
        hash_key = 'uuid'

    class TypeIndex(GlobalIndex):
        """Index for quickly accessing individual tags"""
        name = 'type_index'
        hash_key = 'type'
        projection = ProjectAll()

    class Schema:
        uuid = fields.Str(missing=lambda: str(uuid.uuid4()))
        type = fields.Str(missing=lambda: 'data')
        data = fields.List(fields.Str())


BigProblem.Table.delete()
if not BigProblem.Table.exists:
    BigProblem.Table.create(wait=True)
    for _ in range(1000):
        BigProblem(data=[faker.name() for _ in range(100)]).save()


type_it = BigProblem.TypeIndex.query(type='data')
types = list(type_it)
while type_it.last is not None:
    type_it.again()
    print(len(types))
    types.extend(type_it)
print(len(types))

Expected types to include all the rows in the table.

Result:

File "minimal_query_problem.py", line 41, in
types.extend(type_it)
...
File ".venv/lib/python3.7/site-packages/botocore/client.py", line 586, in _make_api_call
raise error_class(parsed_response, operation_name)
botocore.exceptions.ClientError: An error occurred (ValidationException) when calling the Query operation: KeyConditionExpressions must only contain one condition per key

[iisulop]

Sorry. I had to write the description in a bit of a hurry. Ask for more information if required.