Move Google datastore data to different project or to different account

move-google-datastore.py

# -*- coding: utf-8 -*-
"""
    move_google_datastore

    Move google datastore data to different project / different account.

    :license: MIT
"""
from google.cloud import datastore
from google.cloud.datastore.entity import Entity


# Ref: https://googlecloudplatform.github.io/google-cloud-python/stable/datastore-client.html#google.cloud.datastore.client.Client

old_client = datastore.Client(
    project='project-1',
    namespace='namespace',
    credentials=None  # Use credentials accordingly
)

new_client = datastore.Client(
    project='project-2'
    namespace=None  # None will move to default namespace
    credentials=None  # Use credentials accordingly
)


def move_kind(kind):
    for old_entity in old_client.query(kind=kind).fetch():
        key = new_client.key(kind, old_entity.key.name)  # Create new key
        print "creating..", key
        new_entity = Entity(key, exclude_from_indexes=tuple(old_entity.exclude_from_indexes))  # New entity with same indexes
        for k, v in old_entity.items():
            if isinstance(v, datastore.key.Key):
                if v.id:
                    # TODO: Test autogenerated ids can be moved ?
                    continue
                else:
                    # continue with custom id(name) type
                    v = new_client.key(v.kind, v.name)
            elif type(v) is list:
                # XXX: If value contains list of keys, update all keys to new
                # Keys under new project.
                # Update this accordingly.
                items = []
                for ki in v:
                    if ki.id:
                        # TODO: Test autogenerated ids can be moved ?
                        continue
                    else:
                        # continue with custom id(name) type
                        items.append(new_client.key(ki.kind, ki.name))
                v = items
            new_entity[k] = v
        new_client.put(new_entity)


for kind in ['Kind1', 'Kind2', 'Kind3']:
    move_kind(kind)

Thanks for sharing this solution. The google-cloud package has now been deprecated, so I created a JavaScript version of this script. You can find that here.