GetShapeDefinition Method
Gets the
ArcGIS.Core.Geometry.GeometryType and
ArcGIS.Core.Geometry.SpatialReference for the shape column of the named object type. This method must be called on the MCT. Use QueuedTask.Run.
Modify Entity and Relationship Type Schemas with SchemaBuilder
await QueuedTask.Run(() =>
{
using (var kg = GetKnowledgeGraph())
{
if (kg == null)
return;
var entity_name = "PhoneCall";
var relate_name = "WhoCalledWho";
var kvp_entity = kg.GetDataModel().GetEntityTypes()
.First(r => r.Key == entity_name);
var kvp_relate = kg.GetDataModel().GetRelationshipTypes()
.First(r => r.Key == relate_name);
//Let's delete one field and add a new one from each
//A field gets deleted implicitly if it is not included in the list of
//fields - or "properties" in this case....so we will remove the last
//property from the list
var entity_props = kvp_entity.Value.GetProperties().Reverse().Skip(1).Reverse();
var prop_descs = new List<KnowledgeGraphPropertyDescription>();
foreach (var prop in entity_props)
{
if (prop.FieldType == FieldType.Geometry)
{
continue;//skip shape
}
var prop_desc = new KnowledgeGraphPropertyDescription(prop);
prop_descs.Add(prop_desc);
}
//deal with shape - we need to keep it
//SchemaBuilder deletes any field not included in the "modify" list
ShapeDescription shape_desc = null;
if (kvp_entity.Value.GetIsSpatial())
{
var geom_def = kvp_entity.Value.GetShapeDefinition();
var shape_name = kvp_entity.Value.GetShapeField();
shape_desc = new ShapeDescription(
shape_name, geom_def.geometryType, geom_def.sr);
}
//add the new entity property
prop_descs.Add(
KnowledgeGraphPropertyDescription.CreateStringProperty("foo", 10));
//make a description for the entity type - ok if shape_desc is null
var entityDesc = new KnowledgeGraphEntityTypeDescription(
entity_name, prop_descs, shape_desc);
//Add the entity type description to the schema builder using 'Modify'
SchemaBuilder sb = new(kg);
sb.Modify(entityDesc);
//Repeat for the relationship - assuming we have at least one custom attribute field
//that can be deleted on our relationship schema...
var rel_props = kvp_relate.Value.GetProperties().Reverse().Skip(1).Reverse();
var rel_prop_descs = new List<KnowledgeGraphPropertyDescription>();
foreach (var prop in rel_props)
{
if (prop.FieldType == FieldType.Geometry)
{
continue;//skip shape
}
var prop_desc = new KnowledgeGraphPropertyDescription(prop);
rel_prop_descs.Add(prop_desc);
}
//deal with shape - we need to keep it
//SchemaBuilder deletes any field not included in the "modify" list
ShapeDescription shape_desc_rel = null;
if (kvp_relate.Value.GetIsSpatial())
{
var geom_def = kvp_relate.Value.GetShapeDefinition();
var shape_name = kvp_relate.Value.GetShapeField();
shape_desc_rel = new ShapeDescription(
shape_name, geom_def.geometryType, geom_def.sr);
}
//add a new relationship property
rel_prop_descs.Add(
KnowledgeGraphPropertyDescription.CreateStringProperty("bar", 10));
//make a description for the relationship type - ok if shape_desc is null
var relDesc = new KnowledgeGraphRelationshipTypeDescription(
relate_name, rel_prop_descs, shape_desc_rel);
//Add the relationship type description to the schema builder using 'Modify'
sb.Modify(relDesc);
//Run the schema builder
try
{
//Use the KnowledgeGraph extension method 'ApplySchemaEdits(...)'
//to refresh the Pro UI
if (!kg.ApplySchemaEdits(sb))
{
var err_msg = string.Join(",", sb.ErrorMessages.ToArray());
System.Diagnostics.Debug.WriteLine($"Entity/Relate Modify error: {err_msg}");
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.ToString());
}
}
});
Target Platforms: Windows 11, Windows 10
ArcGIS Pro version: 3.4 or higher.