fix: pydantic v1 issues with dbt 1.6 semantic models

Author: eakmanrq

.github/workflows/pr.yaml

@@ -104,4 +104,42 @@ jobs:
           else
             echo "DBT version is ${{ matrix.dbt-version }} (>= 1.5.0), keeping version parameters"
           fi
+
+          # Remove semantic_models and metrics sections for DBT versions < 1.6.0
+          # Using explicit list to avoid version comparison issues
+          if [[ "${{ matrix.dbt-version }}" == "1.3.0" ]] || \
+             [[ "${{ matrix.dbt-version }}" == "1.4.0" ]] || \
+             [[ "${{ matrix.dbt-version }}" == "1.5.0" ]]; then
+            
+            echo "DBT version is ${{ matrix.dbt-version }} (< 1.6.0), removing semantic_models and metrics sections..."
+            
+            schema_file="../../tests/fixtures/dbt/sushi_test/models/schema.yml"
+            if [[ -f "$schema_file" ]]; then
+              echo "Modifying $schema_file..."
+              
+              # Create a temporary file
+              temp_file=$(mktemp)
+              
+              # Use awk to remove semantic_models and metrics sections
+              awk '
+                /^semantic_models:/ { in_semantic=1; next }
+                /^metrics:/ { in_metrics=1; next }
+                /^[^ ]/ && (in_semantic || in_metrics) { 
+                  in_semantic=0; 
+                  in_metrics=0 
+                }
+                !in_semantic && !in_metrics { print }
+              ' "$schema_file" > "$temp_file"
+              
+              # Move the temp file back
+              mv "$temp_file" "$schema_file"
+              
+              echo "Successfully removed semantic_models and metrics sections"
+            else
+              echo "Schema file not found at $schema_file, skipping..."
+            fi
+          else
+            echo "DBT version is ${{ matrix.dbt-version }} (>= 1.6.0), keeping semantic_models and metrics sections"
+          fi
+
           sqlmesh info --skip-connection

sqlmesh/dbt/manifest.py

@@ -80,6 +80,13 @@
 IGNORED_PACKAGES = {"elementary"}
 BUILTIN_CALLS = {*BUILTIN_GLOBALS, *BUILTIN_FILTERS}
 
+# Patch Semantic Manifest to skip validation and avoid Pydantic v1 errors on DBT 1.6
+# We patch for 1.7+ since we don't care about semantic models
+if DBT_VERSION >= (1, 6, 0):
+    from dbt.contracts.graph.semantic_manifest import SemanticManifest  # type: ignore
+
+    SemanticManifest.validate = lambda _: True  # type: ignore
+
 
 class ManifestHelper:
     def __init__(
@@ -456,6 +463,8 @@ def _load_manifest(self) -> Manifest:
             register_adapter(runtime_config)  # type: ignore
 
         manifest = ManifestLoader.get_full_manifest(runtime_config)
+        # This adapter doesn't care about semantic models so we clear them out to avoid issues
+        manifest.semantic_models = {}
         reset_adapters()
         return manifest
 

tests/fixtures/dbt/sushi_test/models/schema.yml

@@ -52,3 +52,23 @@ sources:
     tables:
       - name: items
       - name: orders
+
+semantic_models:
+  - name: top_waiters
+    description: Some description
+    model: ref('top_waiters')
+    measures:
+      - name: total_waiters
+        agg: sum
+        expr: waiter
+    dimensions:
+      - name: waiter
+        type: categorical
+
+metrics:
+  - name: some_waiter_thing
+    description: Something
+    type: simple
+    label: testing
+    type_params:
+      measure: total_waiters