Feature/issue 85 - Add units to db records

CHANGELOG.md

@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 ### Added
+    - Issue 85 - Add variable units to API response
     - Issue 79 - Generate data for use by benchmarks
     - Issue 88 - There are no CloudWatch logs for the API Gateway
     - Issue 13 - Add SWORD version from shp.xml to DB entries

hydrocron/db/io/swot_reach_node_shp.py

@@ -77,29 +77,43 @@ def read_shapefile(filepath, obscure_data, columns, s3_resource=None):
     return items
 
 
-def parse_metadata_from_shpxml(xml_etree):
+def parse_metadata_from_shpxml(xml_elem):
     """
     Read the SWORD version number from the shp.xml file
     and add to the database fields
 
     Parameters
     ----------
-    xml_etree : xml.etree.ElementTree
-        an Element Tree representation of the shp.xml metadata file
+    xml_elem : xml.etree.ElementTree.Element
+        an Element representation of the shp.xml metadata file
 
     Returns
     -------
     metadata_attrs : dict
         a dictionary of metadata attributes to add to record
     """
-
-    for globs in xml_etree.findall('global_attributes'):
+    # get SWORD version
+    for globs in xml_elem.findall('global_attributes'):
         prior_db_files = globs.find('xref_prior_river_db_files').text
 
     metadata_attrs = {
         'sword_version': prior_db_files[-5:-3]
     }
 
+    # get units on fields that have them
+    for child in xml_elem:
+        if child.tag == 'attributes':
+            for field in child:
+                try:
+                    units = field.find('units').text
+                except AttributeError:
+                    units = ""
+                    logging.info('No units on field %s', field.tag)
+
+                if units != "":
+                    unit_field_name = field.tag + "_units"
+                    metadata_attrs[unit_field_name] = units
+
     return metadata_attrs
 
 

hydrocron/utils/constants.py

@@ -23,8 +23,8 @@
     "time_str": "2023-06-10T19:39:43Z",
     "wse": "286.2983",
     "cycle_id": "548",
-    "sword_version": "15"
-}
+    "sword_version": "15",
+    "p_lat_units": "degrees_north"
 
 DB_TEST_TABLE_NAME = "hydrocron-swot-test-table"
 API_TEST_TABLE_NAME = "hydrocron-swot-reach-table"
@@ -34,6 +34,8 @@
 TEST_TIME_VALUE = '2023-06-10T19:33:37Z'
 TEST_WSE_VALUE = '286.2983'
 TEST_SWORD_VERSION_VALUE = '15'
+TEST_UNITS_FIELD = 'p_lat_units'
+TEST_UNITS = 'degrees_north'
 
 # ------------ #
 # PROD CONSTANTS #

tests/test_hydrocron_database.py

@@ -50,8 +50,10 @@ def test_query(hydrocron_dynamo_table):
 
     items = hydrocron_dynamo_table.run_query(
         partition_key=constants.TEST_REACH_ID_VALUE)
+
     assert items[0][constants.FIELDNAME_WSE] == constants.TEST_WSE_VALUE
     assert items[0][constants.FIELDNAME_SWORD_VERSION] == constants.TEST_SWORD_VERSION_VALUE
+    assert items[0][constants.TEST_UNITS_FIELD] == constants.TEST_UNITS
 
 
 def test_delete_item(hydrocron_dynamo_table):