add schema-dump command, fix imports

Makefile

@@ -34,6 +34,10 @@ serve-local:
 db-head-state:
 	curl -H 'Content-Type: application/json' -d '{"id":1,"jsonrpc":"2.0","method":"db_head_state"}' http://localhost:8080
 
+.PHONY: dump-schema
+dump-schema:
+	pg_dump -s -x --use-set-session-authorization hivepytest  | sed -e '/^--/d' | awk -v RS= -v ORS='\n\n' '1' > schema.sql
+
 ipython:
 	docker run -it $(PROJECT_DOCKER_RUN_ARGS) $(PROJECT_DOCKER_TAG) ipython
 

hive/indexer/accounts.py

@@ -12,7 +12,6 @@ from hive.utils.normalize import rep_log10, vests_amount
 from hive.utils.timer import Timer
 from hive.utils.account import safe_profile_metadata
 from hive.utils.unique_fifo import UniqueFIFO
-from hive.indexer.community import Community
 
 log = logging.getLogger(__name__)
 
@@ -80,6 +79,7 @@ class Accounts:
             cls._ids[name] = _id
 
         # post-insert: pass to communities to check for new registrations
+        from hive.indexer.community import Community
         Community.register(new_names, block_date)
 
     # account cache methods

hive/indexer/community.py

@@ -8,7 +8,6 @@ import ujson as json
 
 from hive.db.adapter import Db
 from hive.indexer.accounts import Accounts
-from hive.indexer.posts import Posts
 
 log = logging.getLogger(__name__)
 
@@ -311,6 +310,8 @@ class CommunityOp:
         assert self.account, 'permlink requires named account'
         _permlink = read_key_str(self.op, 'permlink')
         assert _permlink, 'must name a permlink'
+
+        from hive.indexer.posts import Posts
         _pid, _depth = Posts.get_id_and_depth(self.account, _permlink)
         assert _pid, 'invalid post: %s/%s' % (self.account, _permlink)