handle polymorphic case when no inherited class for specified type

Author: stephanie

Examples/Sample.py

@@ -20,6 +20,7 @@
 # session_factory = dbconnection.createConnection('mysql', 'localhost', 'odm2', 'ODM', 'odm')#mysql
 # session_factory= dbconnection.createConnection('mssql', "(local)", "LBRODM2", "ODM", "odm")#win MSSQL
 session_factory= dbconnection.createConnection('mssql', "arroyoodm2", "", "ODM", "odm")#mac/linux MSSQL
+# session_factory = dbconnection.createConnection('sqlite', '/Users/Stephanie/Desktop/TestODM2.db', 2.0)
 
 
 
@@ -33,15 +34,15 @@
 # ------------------------------
 # Get all of the variables from the database and print their names to the console
 allVars = read.getVariables()
-print "\n-------- Information about Variables ---------"
+print ("\n-------- Information about Variables ---------")
 for x in allVars:
     print(x.VariableCode + ": " + x.VariableNameCV)
 
 
 
 # Get all of the people from the database
 allPeople = read.getPeople()
-print "\n-------- Information about People ---------"
+print ("\n-------- Information about People ---------")
 for x in allPeople:
     print(x.PersonFirstName + " " + x.PersonLastName)
 
@@ -55,12 +56,13 @@
 
 # Get all of the SamplingFeatures from the database that are Sites
 try:
-    print "\n-------- Information about Sites ---------"
-    siteFeatures = read.getSamplingFeatures(type='Site')
+    print ("\n-------- Information about Sites ---------")
+    siteFeatures = read.getSamplingFeatures()
+    # siteFeatures = read.getSamplingFeatures(type='Site')
     numSites = len(siteFeatures)
 
     for x in siteFeatures:
-        print(x.SamplingFeatureCode + ": " + x.SamplingFeatureName)
+        print(x.SamplingFeatureCode + ": " + x.SamplingFeatureTypeCV )
 except Exception as e:
     print("Unable to demo getSamplingFeaturesByType", e)
 
@@ -117,19 +119,19 @@
 
 
 # Now get a particular Result using a ResultID
-print("\n------- Example of Retrieving Attributes of a Time Series Result -------")
+print("\n------- Example of Retrieving Attributes of a Result -------")
 try:
     tsResult = read.getResults(ids = [1])[0]
     print (
-        "The following are some of the attributes for the TimeSeriesResult retrieved using getTimeSeriesResultByResultID(): \n" +
+        "The following are some of the attributes for the TimeSeriesResult retrieved using getResults(ids=[1]): \n" +
         "ResultTypeCV: " + tsResult.ResultTypeCV + "\n" +
         # Get the ProcessingLevel from the TimeSeriesResult's ProcessingLevel object
         "ProcessingLevel: " + tsResult.ProcessingLevelObj.Definition + "\n" +
         "SampledMedium: " + tsResult.SampledMediumCV + "\n" +
         # Get the variable information from the TimeSeriesResult's Variable object
         "Variable: " + tsResult.VariableObj.VariableCode + ": " + tsResult.VariableObj.VariableNameCV + "\n"
-                                                                                                        "AggregationStatistic: " + tsResult.AggregationStatisticCV + "\n" +
-        "Elevation_m: " + str(sf.Elevation_m) + "\n" +
+                               #"AggregationStatistic: " + tsResult.AggregationStatisticCV + "\n" +
+
         # Get the site information by drilling down
         "SamplingFeature: " + tsResult.FeatureActionObj.SamplingFeatureObj.SamplingFeatureCode + " - " +
         tsResult.FeatureActionObj.SamplingFeatureObj.SamplingFeatureName)

Examples/Sample.py.orig

@@ -1,8 +1,7 @@
-from sqlalchemy import BigInteger, Column, Date, DateTime, Float, ForeignKey, Integer, String, Boolean, BLOB
+from sqlalchemy import BigInteger, Column, Date, DateTime, Float, ForeignKey, Integer, String, Boolean, BLOB, case
 from sqlalchemy.orm import relationship
 from sqlalchemy.dialects import postgresql, mysql, sqlite
-# Should not be importing anything from a specific dialect
-# from sqlalchemy.dialects.mssql.base import BIT
+
 
 from geoalchemy import GeometryDDL, GeometryColumn
 from geoalchemy.geometry import Geometry
@@ -280,11 +279,17 @@ class SamplingFeatures(Base):
     FeatureGeometryWKT = Column('featuregeometrywkt', String(50))
     # FeatureGeometry = Column('featuregeometry', BLOB)  # custom geometry queries
     __mapper_args__ = {
+        # 'polymorphic_on': SamplingFeatureTypeCV,
+        "polymorphic_on":case([
+            (SamplingFeatureTypeCV == "Specimen", "Specimen"),
+            (SamplingFeatureTypeCV == "Site", "Site"),
+        ], else_="samplingfeatures"),
         'polymorphic_identity':'samplingfeatures',
-        'polymorphic_on': SamplingFeatureTypeCV,
-        'with_polymorphic':'*'
+        # 'with_polymorphic':'*'
     }
 
+
+
     def shape(self):
         """
         Method name based on shapely shapely.geometry.shape() function.
@@ -466,9 +471,21 @@ class Results(Base):
     VariableObj = relationship(Variables)
 
     __mapper_args__ = {
-        'polymorphic_on':ResultTypeCV,
+        # 'polymorphic_on':ResultTypeCV,
+        "polymorphic_on":case([
+            (ResultTypeCV == "Point coverage", "Point coverage"),
+            (ResultTypeCV == "Profile Coverage", "Profile Coverage"),
+            (ResultTypeCV == "Category coverage", "Category coverage"),
+            (ResultTypeCV == "Transect Coverage", "Transect Coverage"),
+            (ResultTypeCV == "Spectra coverage", "Spectra coverage"),
+            (ResultTypeCV == "Time series coverage", "Time series coverage"),
+            (ResultTypeCV == "Section coverage", "Section coverage"),
+            (ResultTypeCV == "Profile Coverage", "Profile Coverage"),
+            (ResultTypeCV == "Trajectory coverage", "Trajectory coverage"),
+            (ResultTypeCV == "Measurement", "Measurement"),
+        ], else_="results"),
         'polymorphic_identity':'results',
-        'with_polymorphic':'*'
+        # 'with_polymorphic':'*'
     }
 
     def __repr__(self):
@@ -738,7 +755,9 @@ class Specimens(SamplingFeatures):
     __mapper_args__ = {
         'polymorphic_identity':'Specimen',
     }
-
+    def __repr__(self):
+        return "<Specimens('%s', '%s', '%s',  '%s',)>" \
+               % (self.SamplingFeatureID, self.SamplingFeatureCode, self.SpecimenTypeCV,self.SamplingFeatureCode)
 
 class SpatialOffsets(Base):
     __tablename__ = u'spatialoffsets'