(fixes #311) Configure tags, and select them with --models

dbt/contracts/graph/parsed.py

@@ -68,10 +68,23 @@
             'type': 'object',
             'additionalProperties': True,
         },
+        'tags': {
+            'anyOf': [
+                {
+                    'type': 'array',
+                    'items': {
+                        'type': 'string'
+                    },
+                },
+                {
+                    'type': 'string'
+                }
+            ]
+        },
     },
     'required': [
         'enabled', 'materialized', 'post-hook', 'pre-hook', 'vars',
-        'quoting', 'column_types'
+        'quoting', 'column_types', 'tags'
     ]
 }
 

dbt/graph/selector.py

@@ -4,10 +4,17 @@
 from dbt.utils import is_enabled, get_materialization, coalesce
 from dbt.node_types import NodeType
 from dbt.contracts.graph.parsed import ParsedNode
+import dbt.exceptions
 
 SELECTOR_PARENTS = '+'
 SELECTOR_CHILDREN = '+'
 SELECTOR_GLOB = '*'
+SELECTOR_DELIMITER = ':'
+
+
+class SELECTOR_FILTERS:
+    FQN = 'fqn'
+    TAG = 'tag'
 
 
 def split_specs(node_specs):
@@ -34,12 +41,27 @@ def parse_spec(node_spec):
         index_end -= 1
 
     node_selector = node_spec[index_start:index_end]
-    qualified_node_name = node_selector.split('.')
+
+    if SELECTOR_DELIMITER in node_selector:
+        selector_parts = node_selector.split(SELECTOR_DELIMITER, 1)
+        selector_type, selector_value = selector_parts
+
+        node_filter = {
+            "type": selector_type,
+            "value": selector_value
+        }
+
+    else:
+        node_filter = {
+            "type": SELECTOR_FILTERS.FQN,
+            "value": node_selector
+
+        }
 
     return {
         "select_parents": select_parents,
         "select_children": select_children,
-        "qualified_node_name": qualified_node_name,
+        "filter": node_filter,
         "raw": node_spec
     }
 
@@ -74,10 +96,11 @@ def is_selected_node(real_node, node_selector):
     return True
 
 
-def get_nodes_by_qualified_name(graph, qualified_name):
+def get_nodes_by_qualified_name(graph, name):
     """ returns a node if matched, else throws a CompilerError. qualified_name
     should be either 1) a node name or 2) a dot-notation qualified selector"""
 
+    qualified_name = name.split('.')
     package_names = get_package_names(graph)
 
     for node in graph.nodes():
@@ -98,13 +121,37 @@ def get_nodes_by_qualified_name(graph, qualified_name):
                     break
 
 
+def get_nodes_by_tag(graph, tag_name):
+    """ yields nodes from graph that have the specified tag """
+
+    for node in graph.nodes():
+        tags = graph.node[node]['tags']
+
+        if tag_name in tags:
+            yield node
+
+
 def get_nodes_from_spec(graph, spec):
     select_parents = spec['select_parents']
     select_children = spec['select_children']
-    qualified_node_name = spec['qualified_node_name']
 
-    selected_nodes = set(get_nodes_by_qualified_name(graph,
-                                                     qualified_node_name))
+    filter_map = {
+        SELECTOR_FILTERS.FQN: get_nodes_by_qualified_name,
+        SELECTOR_FILTERS.TAG: get_nodes_by_tag,
+    }
+
+    node_filter = spec['filter']
+    filter_func = filter_map.get(node_filter['type'])
+
+    if filter_func is None:
+        valid_selectors = ", ".join(filter_map.keys())
+        logger.info("The '{}' selector specified in {} is invalid. Must be "
+            "one of [{}]".format(node_filter['type'], spec['raw'],
+                                 valid_selectors))
+        selected_nodes = set()
+
+    else:
+        selected_nodes = set(filter_func(graph, node_filter['value']))
 
     additional_nodes = set()
     test_nodes = set()

dbt/model.py

@@ -11,7 +11,7 @@
 class SourceConfig(object):
     ConfigKeys = DBTConfigKeys
 
-    AppendListFields = ['pre-hook', 'post-hook']
+    AppendListFields = ['pre-hook', 'post-hook', 'tags']
     ExtendDictFields = ['vars', 'column_types', 'quoting']
     ClobberFields = [
         'alias',
@@ -94,22 +94,21 @@ def update_in_model_config(self, config):
 
         # make sure we're not clobbering an array of hooks with a single hook
         # string
-        hook_fields = ['pre-hook', 'post-hook']
-        for hook_field in hook_fields:
-            if hook_field in config:
-                config[hook_field] = self.__get_hooks(config, hook_field)
+        for field in self.AppendListFields:
+            if field in config:
+                config[field] = self.__get_as_list(config, field)
 
         self.in_model_config.update(config)
 
-    def __get_hooks(self, relevant_configs, key):
+    def __get_as_list(self, relevant_configs, key):
         if key not in relevant_configs:
             return []
 
-        hooks = relevant_configs[key]
-        if not isinstance(hooks, (list, tuple)):
-            hooks = [hooks]
+        items = relevant_configs[key]
+        if not isinstance(items, (list, tuple)):
+            items = [items]
 
-        return hooks
+        return items
 
     def smart_update(self, mutable_config, new_configs):
         relevant_configs = {
@@ -118,9 +117,9 @@ def smart_update(self, mutable_config, new_configs):
         }
 
         for key in SourceConfig.AppendListFields:
-            new_hooks = self.__get_hooks(relevant_configs, key)
+            append_fields = self.__get_as_list(relevant_configs, key)
             mutable_config[key].extend([
-                h for h in new_hooks if h not in mutable_config[key]
+                f for f in append_fields if f not in mutable_config[key]
             ])
 
         for key in SourceConfig.ExtendDictFields:

dbt/parser/base.py

@@ -7,6 +7,7 @@
 import dbt.hooks
 import dbt.clients.jinja
 import dbt.context.parser
+from dbt.compat import basestring
 
 from dbt.utils import coalesce
 from dbt.logger import GLOBAL_LOGGER as logger
@@ -128,6 +129,10 @@ def parse_node(cls, node, node_path, root_project_config,
         parsed_node.schema = get_schema(schema_override)
         parsed_node.alias = config.config.get('alias', default_alias)
 
+        # Set tags on node provided in config blocks
+        model_tags = config.config.get('tags', [])
+        parsed_node.tags.extend(model_tags)
+
         # Overwrite node config
         config_dict = parsed_node.get('config', {})
         config_dict.update(config.config)

dbt/utils.py

@@ -34,6 +34,7 @@
     'column_types',
     'bind',
     'quoting',
+    'tags',
 ]
 
 

test/integration/007_graph_selection_tests/models/base_users.sql

@@ -1,7 +1,8 @@
 
 {{
     config(
-        materialized = 'ephemeral'
+        materialized = 'ephemeral',
+        tags = ['base']
     )
 }}
 

test/integration/007_graph_selection_tests/models/emails.sql

@@ -1,6 +1,6 @@
 
 {{
-    config(materialized='ephemeral')
+    config(materialized='ephemeral', tags=['base'])
 }}
 
 select distinct email from {{ ref('base_users') }}

test/integration/007_graph_selection_tests/models/users.sql

@@ -1,7 +1,8 @@
 
 {{
     config(
-        materialized = 'table'
+        materialized = 'table',
+        tags='bi'
     )
 }}
 

test/integration/007_graph_selection_tests/models/users_rollup.sql

@@ -1,7 +1,8 @@
 
 {{
     config(
-        materialized = 'view'
+        materialized = 'view',
+        tags = ['bi']
     )
 }}
 

test/integration/007_graph_selection_tests/test_graph_selection.py

@@ -26,6 +26,36 @@ def test__postgres__specific_model(self):
         self.assertFalse('base_users' in created_models)
         self.assertFalse('emails' in created_models)
 
+    @attr(type='postgres')
+    def test__postgres__tags(self):
+        self.use_profile('postgres')
+        self.use_default_project()
+        self.run_sql_file("test/integration/007_graph_selection_tests/seed.sql")
+
+        results = self.run_dbt(['run', '--models', 'tag:bi'])
+        self.assertEqual(len(results), 2)
+
+        created_models = self.get_models_in_schema()
+        self.assertFalse('base_users' in created_models)
+        self.assertFalse('emails' in created_models)
+        self.assertTrue('users' in created_models)
+        self.assertTrue('users_rollup' in created_models)
+
+    @attr(type='postgres')
+    def test__postgres__tags_and_children(self):
+        self.use_profile('postgres')
+        self.use_default_project()
+        self.run_sql_file("test/integration/007_graph_selection_tests/seed.sql")
+
+        results = self.run_dbt(['run', '--models', 'tag:base+'])
+        self.assertEqual(len(results), 2)
+
+        created_models = self.get_models_in_schema()
+        self.assertFalse('base_users' in created_models)
+        self.assertFalse('emails' in created_models)
+        self.assertTrue('users_rollup' in created_models)
+        self.assertTrue('users' in created_models)
+
     @attr(type='snowflake')
     def test__snowflake__specific_model(self):
         self.use_profile('snowflake')

test/integration/007_graph_selection_tests/test_schema_test_graph_selection.py

@@ -62,6 +62,15 @@ def test__postgres__schema_tests_specify_model(self):
             ['unique_users_id']
         )
 
+    @attr(type='postgres')
+    def test__postgres__schema_tests_specify_tag(self):
+        self.run_schema_and_assert(
+            ['tag:bi'],
+            None,
+            ['unique_users_id',
+             'unique_users_rollup_gender']
+        )
+
     @attr(type='postgres')
     def test__postgres__schema_tests_specify_model_and_children(self):
         self.run_schema_and_assert(
@@ -70,6 +79,16 @@ def test__postgres__schema_tests_specify_model_and_children(self):
             ['unique_users_id', 'unique_users_rollup_gender']
         )
 
+    @attr(type='postgres')
+    def test__postgres__schema_tests_specify_tag_and_children(self):
+        self.run_schema_and_assert(
+            ['tag:base+'],
+            None,
+            ['unique_emails_email',
+             'unique_users_id',
+             'unique_users_rollup_gender']
+        )
+
     @attr(type='postgres')
     def test__postgres__schema_tests_specify_model_and_parents(self):
         self.run_schema_and_assert(

test/integration/007_graph_selection_tests/test_tag_selection.py

@@ -0,0 +1,63 @@
+from test.integration.base import DBTIntegrationTest, use_profile
+
+class TestGraphSelection(DBTIntegrationTest):
+
+    @property
+    def schema(self):
+        return "graph_selection_tests_007"
+
+    @property
+    def models(self):
+        return "test/integration/007_graph_selection_tests/models"
+
+    @property
+    def project_config(self):
+        return {
+            "models": {
+                "test": {
+                    "users": {
+                        "tags": "specified_as_string"
+                    },
+
+                    "users_rollup": {
+                        "tags": ["specified_in_project"]
+                    }
+                }
+            }
+        }
+
+    @use_profile('postgres')
+    def test__postgres__select_tag(self):
+        self.run_sql_file("test/integration/007_graph_selection_tests/seed.sql")
+
+        results = self.run_dbt(['run', '--models', 'tag:specified_as_string'])
+        self.assertEqual(len(results), 1)
+
+        models_run = [r.node['name'] for r in results]
+        self.assertTrue('users' in models_run)
+
+
+    @use_profile('postgres')
+    def test__postgres__select_tag_and_children(self):
+        self.run_sql_file("test/integration/007_graph_selection_tests/seed.sql")
+
+        results = self.run_dbt(['run', '--models', '+tag:specified_in_project+'])
+        self.assertEqual(len(results), 2)
+
+        models_run = [r.node['name'] for r in results]
+        self.assertTrue('users' in models_run)
+        self.assertTrue('users_rollup' in models_run)
+
+
+    # check that model configs aren't squashed by project configs
+    @use_profile('postgres')
+    def test__postgres__select_tag_in_model_with_project_Config(self):
+        self.run_sql_file("test/integration/007_graph_selection_tests/seed.sql")
+
+        results = self.run_dbt(['run', '--models', 'tag:bi'])
+        self.assertEqual(len(results), 2)
+
+        models_run = [r.node['name'] for r in results]
+        self.assertTrue('users' in models_run)
+        self.assertTrue('users_rollup' in models_run)
+