From 444f7eaac39eb1905e1dffc8af736a77cce9563b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nguy=E1=BB=85n=20H=E1=BB=93ng=20Qu=C3=A2n?=
 <ng.hong.quan@gmail.com>
Date: Sun, 26 Nov 2017 12:40:01 +0700
Subject: [PATCH] Fix: Return wrong query syntax "SELECT FROM" when no tags and
 fields

---
 influxalchemy/query.py |  4 +++-
 tests/query_test.py    | 12 ++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/influxalchemy/query.py b/influxalchemy/query.py
index 6c822c0..2a8a8e6 100644
--- a/influxalchemy/query.py
+++ b/influxalchemy/query.py
@@ -78,7 +78,9 @@ def _select(self):
                         selects.append(field)
                 # pylint: disable=bare-except
                 except:
-                    selects = ["*"]
+                    pass
+        if not selects:
+            selects = ["*"]
         return selects
 
     @property
diff --git a/tests/query_test.py b/tests/query_test.py
index 42e0086..19280d3 100644
--- a/tests/query_test.py
+++ b/tests/query_test.py
@@ -115,3 +115,15 @@ def test_get_tags_fields(mock_fields, mock_tags):
     fizz = Measurement.new("fuzz")
     query = client.query(fizz)
     assert str(query) == "SELECT fizz, buzz, foo, goo FROM fuzz;"
+
+
+@mock.patch("influxalchemy.InfluxAlchemy.tags")
+@mock.patch("influxalchemy.InfluxAlchemy.fields")
+def test_get_empty_tags_fields(mock_fields, mock_tags):
+    mock_tags.return_value = []
+    mock_fields.return_value = []
+    db = influxdb.InfluxDBClient(database="example")
+    client = InfluxAlchemy(db)
+    fizz = Measurement.new("fuzz")
+    query = client.query(fizz)
+    assert str(query) == "SELECT * FROM fuzz;"