Merge pull request #6 from calogica/feature/add-dynamic-date-support-to-get_base_dates

Update base date logic to allow to dynamic date ranges

Author: clausherther

macros/get_base_dates.sql

@@ -1,15 +1,26 @@
-{% macro get_base_dates(start_date, end_date) %}
+{% macro get_base_dates(start_date=None, end_date=None, n_dateparts=None, datepart=None) %}
 with date_spine as
 (
+    {% if start_date and end_date %}
+    {%- set start_date="cast('" ~ start_date ~ "' as datetime)" -%}
+    {%- set end_date="cast('" ~ end_date ~ "' as datetime)"  -%}
+
+    {% elif n_dateparts and datepart %}
+
+    {%- set start_date = dbt_utils.dateadd(datepart, -1 * n_dateparts, dbt_date.today()) -%}
+    {%- set end_date = dbt_date.tomorrow() -%}
+    {% endif %}
+
     {{ dbt_utils.date_spine(
         datepart="day",
-        start_date="cast('" ~ start_date ~ "' as datetime)",
-        end_date="cast('" ~ end_date ~ "' as datetime)",
+        start_date=start_date,
+        end_date=end_date,
        )
     }}
+
 )
 select
-    d.date_day
+    date(d.date_day) as date_day
 from
     date_spine d
 {% endmacro %}