[Backport 1.5.latest] fix #7407: print model version in dbt show if specified

.changes/unreleased/Fixes-20230508-042707.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: print model version in dbt show if specified
+time: 2023-05-08T04:27:07.9965-07:00
+custom:
+  Author: aranke
+  Issue: "7407"

core/dbt/task/show.py

@@ -75,9 +75,14 @@ def task_end_messages(self, results):
             else:
                 table.print_table(output=output, max_rows=None)
 
+            node_name = result.node.name
+
+            if hasattr(result.node, "version") and result.node.version:
+                node_name += f".v{result.node.version}"
+
             fire_event(
                 ShowNode(
-                    node_name=result.node.name,
+                    node_name=node_name,
                     preview=output.getvalue(),
                     is_inline=is_inline,
                     output_format=self.args.output,

tests/functional/show/fixtures.py

@@ -10,6 +10,35 @@
 from {{ ref('sample_model') }}
 """
 
+schema_yml = """
+models:
+  - name: sample_model
+    latest_version: 1
+
+    # declare the versions, and fully specify them
+    versions:
+      - v: 2
+        config:
+          materialized: table
+        columns:
+          - name: sample_num
+            data_type: int
+          - name: sample_bool
+            data_type: bool
+          - name: answer
+            data_type: int
+
+      - v: 1
+        config:
+          materialized: table
+          contract: {enforced: true}
+        columns:
+          - name: sample_num
+            data_type: int
+          - name: sample_bool
+            data_type: bool
+"""
+
 models__ephemeral_model = """
 {{ config(materialized = 'ephemeral') }}
 select

tests/functional/show/test_show.py

@@ -8,6 +8,7 @@
     models__sample_model,
     models__second_model,
     models__ephemeral_model,
+    schema_yml,
 )
 
 
@@ -85,3 +86,29 @@ def test_second_ephemeral_model(self, project):
             ["show", "--inline", models__second_ephemeral_model]
         )
         assert "col_hundo" in log_output
+
+
+class TestShowModelVersions:
+    @pytest.fixture(scope="class")
+    def models(self):
+        return {
+            "schema.yml": schema_yml,
+            "sample_model.sql": models__sample_model,
+            "sample_model_v2.sql": models__second_model,
+        }
+
+    @pytest.fixture(scope="class")
+    def seeds(self):
+        return {"sample_seed.csv": seeds__sample_seed}
+
+    def test_version_unspecified(self, project):
+        run_dbt(["build"])
+        (results, log_output) = run_dbt_and_capture(["show", "--select", "sample_model"])
+        assert "Previewing node 'sample_model.v1'" in log_output
+        assert "Previewing node 'sample_model.v2'" in log_output
+
+    def test_none(self, project):
+        run_dbt(["build"])
+        (results, log_output) = run_dbt_and_capture(["show", "--select", "sample_model.v2"])
+        assert "Previewing node 'sample_model.v1'" not in log_output
+        assert "Previewing node 'sample_model.v2'" in log_output