Add non interval date time query to sqlalchemy backend (#262)

* add non interval date to searc request

* add datetime test

* check first 18 chanracters of datetime

* add comment about non inerval data

* test multiple datetime formats

* erase duplicate test date

* run pre-commit

* run pre-commit

Co-authored-by: Rob Emanuele <rdemanuele@gmail.com>
Co-authored-by: Nathan Zimmerman <npzimmerman@gmail.com>

stac_fastapi/sqlalchemy/stac_fastapi/sqlalchemy/core.py

@@ -338,13 +338,16 @@ def post_search(
                 if search_request.datetime:
                     # Two tailed query (between)
                     dts = search_request.datetime.split("/")
-                    if ".." not in search_request.datetime:
+                    # Non-interval date ex. "2000-02-02T00:00:00.00Z"
+                    if len(dts) == 1:
+                        query = query.filter(self.item_table.datetime == dts[0])
+                    elif ".." not in search_request.datetime:
                         query = query.filter(self.item_table.datetime.between(*dts))
                     # All items after the start date
-                    if dts[0] != "..":
+                    elif dts[0] != "..":
                         query = query.filter(self.item_table.datetime >= dts[0])
                     # All items before the end date
-                    if dts[1] != "..":
+                    elif dts[1] != "..":
                         query = query.filter(self.item_table.datetime <= dts[1])
 
                 # Query fields

stac_fastapi/sqlalchemy/tests/api/test_api.py

@@ -174,6 +174,28 @@ def test_search_invalid_date(load_test_data, app_client, postgres_transactions):
     assert resp.status_code == 400
 
 
+def test_datetime_non_interval(load_test_data, app_client, postgres_transactions):
+    item = load_test_data("test_item.json")
+    postgres_transactions.create_item(item, request=MockStarletteRequest)
+    alternate_formats = [
+        "2020-02-12T12:30:22+00:00",
+        "2020-02-12T12:30:22.00Z",
+        "2020-02-12T12:30:22Z",
+        "2020-02-12T12:30:22.00+00:00",
+    ]
+    for date in alternate_formats:
+        params = {
+            "datetime": date,
+            "collections": [item["collection"]],
+        }
+
+        resp = app_client.post("/search", json=params)
+        assert resp.status_code == 200
+        resp_json = resp.json()
+        # datetime is returned in this format "2020-02-12T12:30:22+00:00"
+        assert resp_json["features"][0]["properties"]["datetime"][0:19] == date[0:19]
+
+
 def test_bbox_3d(load_test_data, app_client, postgres_transactions):
     item = load_test_data("test_item.json")
     postgres_transactions.create_item(item, request=MockStarletteRequest)