Update website/docs/reference/resource-properties/constraints.md

website/docs/reference/resource-properties/constraints.md

@@ -101,7 +101,38 @@ Here are some examples showing how the new syntax is used:
 ```yml
 
 models:
-
+models:
+  - name: <model_name>
+    
+    # required
+    config:
+      contract:
+        enforced: true
+    
+    # model-level constraints
+    constraints:
+      - type: primary_key
+        columns: [FIRST_COLUMN, SECOND_COLUMN, ...]
+      - type: FOREIGN_KEY # multi_column
+        columns: [FIRST_COLUMN, SECOND_COLUMN, ...]
+        expression: "OTHER_MODEL_SCHEMA.OTHER_MODEL_NAME (OTHER_MODEL_FIRST_COLUMN, OTHER_MODEL_SECOND_COLUMN, ...)"
+      - type: check
+        columns: [FIRST_COLUMN, SECOND_COLUMN, ...]
+        expression: "FIRST_COLUMN != SECOND_COLUMN"
+        name: HUMAN_FRIENDLY_NAME
+      - type: ...
+    
+    columns:
+      - name: FIRST_COLUMN
+        data_type: DATA_TYPE
+        
+        # column-level constraints
+        constraints:
+          - type: not_null
+          - type: unique
+          - type: foreign_key
+            expression: OTHER_MODEL_SCHEMA.OTHER_MODEL_NAME (OTHER_MODEL_COLUMN)
+          - type: ...
 
 
 ```