def test_do(self):
ref = self._create()["ref"]
self.assertEqual(self._q(query.do(query.delete(ref), 1)), 1)
self.assertFalse(self._q(query.exists(ref)))
self.assertEqual(self._q(query.do(1)), 1)
self.assertEqual(self._q(query.do(1, 2)), 2)
self.assertEqual(self._q(query.do([1, 2])), [1, 2])
def update_documents(sql_query: sql.SQLQuery) -> QueryExpression:
"""Update document fields with the given values.
Params:
-------
table: Table object that contains the parameters for building an update query in FQL.
Returns:
--------
An FQL update query for the given collection and documents.
"""
assert len(sql_query.tables) == 1
table = sql_query.tables[0]
assert len(sql_query.filter_groups) <= 1
filter_group = (None if not any(sql_query.filter_groups) else
sql_query.filter_groups[0])
field_updates = {column.name: column.value for column in table.columns}
return q.let(
{"document_set": build_document_set_intersection(table, filter_group)},
q.do(
q.update(
q.select(
"ref",
q.get(q.var("document_set")),
),
{"data": field_updates},
),
{"data": [{
"count": q.count(q.var("document_set"))
}]},
),
)
def create_user(data):
try:
current_identity = get_current_identity()
email_hash = md5(
current_identity['data']['username'].encode('utf-8')).hexdigest()
return current_app.fauna_client.query(
q.if_(
q.is_ref(
q.select_with_default(['data', 'user'],
q.get(q.current_identity()), None)),
q.abort('exists'),
q.let(
{
'userMetaRef': q.new_id(),
'userRef': q.new_id()
},
q.do(
q.create(
q.ref(q.collection('user_metas'),
q.var('userMetaRef')),
{
'data': {
'name':
data.get('name'),
'email':
q.select(['data', 'username'],
q.get(q.current_identity())),
'dob':
parser.parse(data.get('dob')).date()
}
}),
q.create(
q.ref(q.collection('users'),
q.var('userRef')),
{
'data': {
'alias':
data.get('alias'),
'avatar':
f'https://www.gravatar.com/avatar/{email_hash}',
'public':
False,
'meta':
q.ref(q.collection('user_metas'),
q.var('userMetaRef')),
}
}),
q.update(
q.current_identity(), {
'data': {
'user':
q.ref(q.collection('users'),
q.var('userRef'))
}
}), q.call('current_user', [])))))
except Exception as e:
if str(e) == 'exists':
abort(409, 'User for current identity already exists.')
print(e)
def _delete_data():
resources = [q.functions(), q.indexes(), q.collections()]
delete = lambda res: q.foreach(
q.lambda_("res", q.delete(q.var("res"))), q.paginate(res)
)
delete_queries = [delete(res) for res in resources]
_execute_with_retries(q.do(*delete_queries))
def _translate_create_index(statement: token_groups.Statement,
idx: int) -> typing.List[QueryExpression]:
_, unique = statement.token_next_by(m=(token_types.Keyword, "UNIQUE"),
idx=idx)
idx, _ = statement.token_next_by(m=(token_types.Keyword, "ON"), idx=idx)
_, index_params = statement.token_next_by(i=token_groups.Function, idx=idx)
params_idx, table_identifier = index_params.token_next_by(
i=token_groups.Identifier)
table_name = table_identifier.value
params_idx, column_identifiers = index_params.token_next_by(
i=token_groups.Parenthesis, idx=params_idx)
index_fields = [
token.value for token in column_identifiers.flatten()
if token.ttype == token_types.Name
]
if len(index_fields) > 1:
raise exceptions.NotSupportedError(
"Creating indexes for multiple columns is not currently supported."
)
index_terms = [{
"field": ["data", index_field]
} for index_field in index_fields]
index_name = fql.index_name(table_name,
column_name=index_fields[0],
index_type=fql.IndexType.TERM)
return [
q.do(
q.if_(
# We automatically create indices for some fields on collection creation,
# so we can skip explicit index creation if it already exists.
q.exists(q.index(index_name)),
None,
q.create_index({
"name": index_name,
"source": q.collection(table_name),
"terms": index_terms,
"unique": unique,
}),
),
q.let(
{"collection": q.collection(table_name)},
{"data": [{
"id": q.var("collection")
}]},
),
)
]
def _make_sure_information_schema_exists() -> typing.List[QueryExpression]:
index_queries = [
_create_table_indices(collection_name, field_metadata)
for collection_name, field_metadata in
INFORMATION_SCHEMA_COLLECTIONS.items()
]
return [
q.if_(
q.exists(q.collection("information_schema_tables_")),
None,
q.do(*[
q.create_collection({"name": collection_name})
for collection_name in INFORMATION_SCHEMA_COLLECTIONS
]),
),
q.if_(
q.exists(q.index(fql.index_name("information_schema_tables_"))),
None,
q.do(*index_queries),
),
]
def unsubscribe_from_anime(self, anime_doc_id: str):
try:
anime = client.query(
q.get(q.ref(q.collection(animes), anime_doc_id)))
client.query(
q.let(
{
'anime_ref':
q.ref(q.collection(animes), anime_doc_id),
'bot_user':
q.ref(q.collection(users), self.chat_id),
'followers':
q.select(['data', 'followers'],
q.get(q.var('anime_ref'))),
},
q.do(
q.update(
q.var('anime_ref'), {
'data': {
'followers': q.subtract(
q.var('followers'), 1)
}
}),
q.update(
q.var('bot_user'), {
'data': {
'animes_watching':
q.filter_(
q.lambda_(
'watched_anime_ref',
q.not_(
q.equals(
q.var('watched_anime_ref'),
q.var('anime_ref')))),
q.select(['data', 'animes_watching'],
q.get(q.var('bot_user'))))
}
}),
q.if_(q.equals(q.var('followers'), 1),
q.delete(q.var('anime_ref')), 'successful!'))))
updater.bot.send_message(chat_id=self.chat_id,
text='You have stopped following ' +
anime['data']['title'])
except errors.NotFound:
logger.info(
'Somehow, a user {0} almost unsubscribed from an anime that did not exist'
.format(self.chat_id))
except Exception as err:
log_error(err)
def create_transaction(client, num_customers, max_txn_amount):
#
# This method is going to create a random transaction that moves a random amount
# from a source customer to a destination customer. Prior to committing the transaction
# a check will be performed to insure that the source customer has a sufficient balance
# to cover the amount and not go into an overdrawn state.
#
uuid = uuid4().urn[9:]
source_id = randint(1, num_customers)
dest_id = randint(1, num_customers)
while dest_id == source_id:
dest_id = randint(1, num_customers)
amount = randint(1, max_txn_amount)
transaction = {"uuid": uuid, "sourceCust": source_id, "destCust": dest_id , "amount": amount}
res = client.query(
q.let(
{"source_customer": q.get(q.match(q.index("customer_by_id"), source_id)),
"dest_customer": q.get(q.match(q.index("customer_by_id"), dest_id))},
q.let(
{"source_balance": q.select(["data", "balance"], q.var("source_customer")),
"dest_balance": q.select(["data", "balance"], q.var("dest_customer"))},
q.let(
{"new_source_balance": q.subtract(q.var("source_balance"), amount),
"new_dest_balance": q.add(q.var("dest_balance"), amount)},
q.if_(
q.gte(q.var("new_source_balance"), 0),
q.do(
q.create(q.class_("transactions"), {"data": transaction}),
q.update(q.select("ref", q.var("source_customer")),
{"data": {"txnID": uuid, "balance": q.var("new_source_balance")}}),
q.update(q.select("ref", q.var("dest_customer")),
{"data": {"txnID": uuid, "balance": q.var("new_dest_balance")}})
),
"Error. Insufficient funds."
)
)
)
)
)
def _translate_create_table(
statement: token_groups.Statement,
table_token_idx: int) -> typing.List[QueryExpression]:
idx, table_identifier = statement.token_next_by(i=token_groups.Identifier,
idx=table_token_idx)
table_name = table_identifier.value
idx, column_identifiers = statement.token_next_by(
i=token_groups.Parenthesis, idx=idx)
field_metadata = _extract_column_definitions(column_identifiers)
index_queries = _create_table_indices(table_name, field_metadata)
collection_metadata: CollectionMetadata = {
"fields": field_metadata,
"indexes": _create_index_metadata(table_name, field_metadata),
}
information_metadata_query = _update_information_metadata(
table_name, collection_metadata)
# Fauna creates resources asynchronously, so we cannot create and use a collection
# in the same transaction, so we have to run the expressions that create
# the collection and the indices that depend on it separately
return [
*_make_sure_information_schema_exists(),
q.create_collection({"name": table_name}),
q.do(
*index_queries,
information_metadata_query,
q.let(
{"collection": q.collection(table_name)},
{"data": [{
"id": q.var("collection")
}]},
),
),
]
def translate_drop(
statement: token_groups.Statement) -> typing.List[QueryExpression]:
"""Translate a DROP SQL query into an equivalent FQL query.
Params:
-------
statement: An SQL statement returned by sqlparse.
Returns:
--------
An FQL query expression.
"""
idx, _ = statement.token_next_by(m=(token_types.Keyword, "TABLE"))
_, table_identifier = statement.token_next_by(i=token_groups.Identifier,
idx=idx)
table_name = table_identifier.value
deleted_collection = q.select("ref", q.delete(q.collection(table_name)))
return [
q.do(
q.map_(
q.lambda_("ref", q.delete(q.var("ref"))),
q.paginate(
q.union(
q.match(
q.index(
fql.index_name(
"information_schema_tables_",
column_name="name_",
index_type=fql.IndexType.TERM,
)),
table_name,
),
fql.convert_to_ref_set(
"information_schema_columns_",
q.range(
q.match(
q.index(
fql.index_name(
"information_schema_columns_",
column_name="table_name_",
index_type=fql.IndexType.VALUE,
))),
[table_name],
[table_name],
),
),
fql.convert_to_ref_set(
"information_schema_indexes_",
q.range(
q.match(
q.index(
fql.index_name(
"information_schema_indexes_",
column_name="table_name_",
index_type=fql.IndexType.VALUE,
))),
[table_name],
[table_name],
),
),
), ),
),
q.let(
{"collection": deleted_collection},
{"data": [{
"id": q.var("collection")
}]},
),
)
]
def test_do(self):
self.assertJson(query.do(query.add(1, 2), query.var("x")),
'{"do":[{"add":[1,2]},{"var":"x"}]}')
self.assertJson(query.do(1), '{"do":[1]}')
self.assertJson(query.do(1, 2), '{"do":[1,2]}')
self.assertJson(query.do([1, 2]), '{"do":[[1,2]]}')
def _update_information_metadata(
table_name: str,
collection_metadata: CollectionMetadata) -> QueryExpression:
column_metadata = [{
"name_": "id",
"table_name_": table_name,
"type_": "Integer",
"nullable": False,
"default_": None,
}]
column_metadata.extend([
{
"name_": name,
"table_name_": table_name,
"type_": metadata["type"],
# A bit awkward, but SQL uses the 'NOT NULL' keyword, while SQLAlchemy
# uses 'nullable' when returning metadata
"nullable_": not metadata["not_null"],
"default_": metadata["default"],
} for name, metadata in collection_metadata["fields"].items()
])
index_metadata = [{
"name_": index_name,
"table_name_": table_name,
**typing.cast(typing.Dict[str, typing.Any], metadata),
} for index_name, metadata in collection_metadata["indexes"].items()]
return q.if_(
# We don't want to update information schema collections with information schema info,
# because that would some weird inception-type stuff.
q.contains_str_regex(
table_name, r"^information_schema_(?:tables|columns|indexes)_$"),
None,
q.do(
q.create(
q.collection("information_schema_tables_"),
{"data": {
"name_": table_name
}},
),
q.foreach(
q.lambda_(
"column_metadata",
q.create(
q.collection("information_schema_columns_"),
{"data": q.var("column_metadata")},
),
),
column_metadata,
),
q.foreach(
q.lambda_(
"index_metadata",
q.create(
q.collection("information_schema_indexes_"),
{"data": q.var("index_metadata")},
),
),
index_metadata,
),
),
)
def subscribe_to_anime(self, anime_link: str):
try:
# create a new anime document
anime_info = anime_alarm.utils.GGAScraper().get_anime_info(
anime_link)
print(anime_info['anime_id'])
result = client.query(
q.let(
{
'user_anime_list':
q.select(['data', 'animes_watching'],
q.get(q.ref(q.collection(users),
self.chat_id))),
},
q.if_(
# check if this anime exists in the db
q.exists(
q.match(q.index(anime_by_id),
anime_info['anime_id'])),
# if it exists...
q.let(
{
'anime_ref':
q.select(
'ref',
q.get(
q.match(q.index(anime_by_id),
anime_info['anime_id'])))
},
q.if_(
# check if user has subscribed to this anime already
q.contains_value(q.var('anime_ref'),
q.var('user_anime_list')),
'This anime is already on your watch list!',
q.do(
q.update(
q.ref(q.collection(users),
self.chat_id),
{
'data': {
'animes_watching':
q.append(
q.var('user_anime_list'),
[q.var('anime_ref')])
}
}),
q.update(
q.var('anime_ref'), {
'data': {
'followers':
q.add(
q.select([
'data', 'followers'
], q.get(
q.var('anime_ref'))),
1)
}
}),
))),
q.let(
{'new_anime_id': q.new_id()},
q.do(
# create new anime document
q.create(
q.ref(q.collection(animes),
q.var('new_anime_id')),
{
'data': {
'title':
anime_info['title'],
'followers':
1,
'link':
anime_link,
'anime_id':
anime_info['anime_id'],
'anime_alias':
anime_info['anime_alias'],
'episodes':
anime_info['number_of_episodes'],
'last_episode': {
'link':
anime_info[
'latest_episode_link'],
'title':
anime_info[
'latest_episode_title'],
},
}
}),
# add to user's list of subscribed animes
q.update(
q.ref(q.collection(users), self.chat_id), {
'data': {
'animes_watching':
q.append(
q.var('user_anime_list'), [
q.ref(
q.collection(animes),
q.var('new_anime_id'))
])
}
}),
)))))
if isinstance(result, str):
updater.bot.send_message(chat_id=self.chat_id, text=result)
else:
updater.bot.send_message(
chat_id=self.chat_id,
text='You are now listening for updates on ' +
anime_info['title'])
except Exception as err:
log_error(err)
