Add default values for fk_provider and fk_dataowner

datamodel/app/create_app.py

@@ -172,6 +172,9 @@ def create_app(
         "view/catchment_area/vw_catchment_area_wwp_connections.sql", pg_service, variables
     )
 
+    # default values
+    run_sql_file("view/set_default_value_for_views.sql", pg_service, variables)
+
     # Recreate network views
     run_sql_file("view/network/vw_network_node.sql", pg_service, variables)
     run_sql_file("view/network/vw_network_segment.sql", pg_service, variables)

datamodel/app/view/set_default_value_for_views.sql

@@ -0,0 +1,23 @@
+DO
+$BODY$
+DECLARE
+    tbl text;
+	col text;
+BEGIN
+	FOR tbl,col IN
+	SELECT
+       c.table_name,
+       c.column_name
+    FROM information_schema.columns c
+	LEFT JOIN information_schema.tables t
+	ON c.table_name = t.table_name
+      AND c.table_schema = t.table_schema
+    WHERE c.column_name IN ('fk_provider','fk_dataowner')
+      AND c.table_schema ='tww_app'
+	  AND t.table_type = 'VIEW'
+    LOOP
+        EXECUTE format($$ ALTER VIEW tww_app.%1$I ALTER %2$I SET DEFAULT tww_sys.get_default_values('%2$s') $$, tbl,col);
+    END LOOP;
+
+END;
+$BODY$

datamodel/app/view/vw_tww_reach.py

@@ -205,7 +205,11 @@ def vw_tww_reach(pg_service: str = None, extra_definition: dict = None):
             indent=2,
             skip_columns=[],
             coalesce_pkey_default=True,
-            insert_values={"situation3d_geometry": "ST_StartPoint(NEW.progression3d_geometry)"},
+            insert_values={
+                "situation3d_geometry": "ST_StartPoint(NEW.progression3d_geometry)",
+                "fk_provider": "COALESCE(NULLIF(NEW.rp_from_fk_provider,''), NEW.fk_provider)",
+                "fk_dataowner": "COALESCE(NULLIF(NEW.rp_from_fk_dataowner,''), NEW.fk_dataowner)",
+            },
             returning="obj_id INTO NEW.rp_from_obj_id",
         ),
         rp_to=insert_command(
@@ -217,7 +221,11 @@ def vw_tww_reach(pg_service: str = None, extra_definition: dict = None):
             indent=2,
             skip_columns=[],
             coalesce_pkey_default=True,
-            insert_values={"situation3d_geometry": "ST_EndPoint(NEW.progression3d_geometry)"},
+            insert_values={
+                "situation3d_geometry": "ST_EndPoint(NEW.progression3d_geometry)",
+                "fk_provider": "COALESCE(NULLIF(NEW.rp_to_fk_provider,''), NEW.fk_provider)",
+                "fk_dataowner": "COALESCE(NULLIF(NEW.rp_to_fk_dataowner,''), NEW.fk_dataowner)",
+            },
             returning="obj_id INTO NEW.rp_to_obj_id",
         ),
         ws=insert_command(
@@ -229,12 +237,14 @@ def vw_tww_reach(pg_service: str = None, extra_definition: dict = None):
             indent=2,
             skip_columns=[
                 "detail_geometry3d_geometry",
-                "fk_dataowner",
-                "fk_provider",
                 "_label",
                 "_depth",
                 "fk_main_cover",
             ],
+            insert_values={
+                "fk_provider": "NEW.fk_provider",
+                "fk_dataowner": "NEW.fk_dataowner",
+            },
         ),
         ch=insert_command(
             pg_cur=cursor,

datamodel/changelogs/0001/14_default_values.sql

@@ -0,0 +1,50 @@
+CREATE TABLE tww_od.default_values
+(
+    fieldname text NOT NULL,
+    value_obj_id varchar(16),
+    CONSTRAINT pkey_tww_sys_default_values_fieldname PRIMARY KEY (fieldname)
+);
+
+-- function for retrieving default obj_id
+CREATE OR REPLACE FUNCTION tww_sys.get_default_values(field_name text)
+  RETURNS varchar(16) AS
+$BODY$
+DECLARE
+    myrec record;
+BEGIN
+  BEGIN
+    SELECT value_obj_id::varchar(16) INTO myrec FROM tww_od.default_values WHERE fieldname = field_name;
+    EXCEPTION
+        WHEN NO_DATA_FOUND THEN
+           RAISE WARNING 'Field name % not found in table tww_od.default_values. Returning NULL',field_name;
+		   RETURN NULL;
+  END;
+  RETURN myrec.value_obj_id;
+END;
+$BODY$
+  LANGUAGE plpgsql STABLE SECURITY DEFINER
+  COST 100;
+
+-- Set defaults on all fk_provider,fk_dataowner
+DO $do$
+DECLARE
+    tbl text;
+	col text;
+BEGIN
+	FOR tbl,col IN
+	SELECT
+       c.table_name,
+	   c.column_name
+    FROM information_schema.columns c
+	LEFT JOIN information_schema.tables t
+	ON c.table_name = t.table_name
+    and c.table_schema = t.table_schema
+    WHERE c.column_name IN ('fk_provider','fk_dataowner')
+      and c.table_schema ='tww_od'
+	  and t.table_type = 'BASE TABLE'
+    LOOP
+        EXECUTE format($$ ALTER TABLE tww_od.%1$I ALTER COLUMN %2$I SET DEFAULT tww_sys.get_default_values('%2$s') $$, tbl,col);
+    END LOOP;
+
+END;
+$do$;

datamodel/scripts/setup.sh

@@ -26,6 +26,7 @@ psql "service=${PGSERVICE}" -v ON_ERROR_STOP=1 -f ${DIR}/changelogs/0001/07_netw
 psql "service=${PGSERVICE}" -v ON_ERROR_STOP=1 -f ${DIR}/changelogs/0001/09_tww_dictionaries.sql -v SRID=$SRID
 psql "service=${PGSERVICE}" -v ON_ERROR_STOP=1 -f ${DIR}/changelogs/0001/09_tww_dictionaries_kek.sql -v SRID=$SRID
 psql "service=${PGSERVICE}" -v ON_ERROR_STOP=1 -f ${DIR}/changelogs/0001/13_import.sql -v SRID=$SRID
+psql "service=${PGSERVICE}" -v ON_ERROR_STOP=1 -f ${DIR}/changelogs/0001/14_default_values.sql
 psql "service=${PGSERVICE}" -v ON_ERROR_STOP=1 -f ${DIR}/changelogs/0001/fix_wastewater_structure.sql
 psql "service=${PGSERVICE}" -v ON_ERROR_STOP=1 -f ${DIR}/changelogs/0001/fix_depth.sql
 psql "service=${PGSERVICE}" -v ON_ERROR_STOP=1 -f ${DIR}/changelogs/0001/51_dss15_aquifer.sql -v SRID=$SRID

docs/en/user-guide/How-To/index.rst

@@ -216,6 +216,17 @@ The Feature Attributes window for the overflow characteristic appears:
 
 3. Go back in the field fk_overflow characteristic of the just created overflow characteristic with the button **switch to form view** and define the necessary HQ or QQ values with the **add child object** button.
 
+Setting default values
+-----------------------
+
+It is possible to define default values for repeated fields such as fk_provider or fk_dataowner.
+
+1. Enter field name and value in the corresponding attributes in ``tww_od.default values``
+
+2. Connect all ccurences of your field name to ``tww_sys.get_default_values(field_name)``.
+Per default, the fields ``fk_provider`` and ``fk_dataowner`` are already connected to the function ``tww_sys.get_default_values(field_name)``.
+An example SQL script how to insert the default value for all occurences of a field name can be found `here <https://github.com/teksi/wastewater/blob/main/datamodel/changelogs/0001/14_default_values.sql>`_)
+
 Further informations
 --------------------