add coursesinprogram mart (#1296)

add marts__combined__coursesinprogram as a reference table

src/ol_dbt/models/marts/combined/_marts__combined__models.yml

@@ -1,7 +1,34 @@
 ---
 version: 2
-
 models:
+- name: marts__combined_coursesinprogram
+  description: Mart model for course to program association for the different platforms
+  columns:
+  - name: platform
+    description: str, name of the platform
+    tests:
+    - not_null
+  - name: course_readable_id
+    description: str, Open edX ID formatted as course-v1:{org}+{course code} e.g.
+      course-v1:xPRO+MLx2
+  - name: course_title
+    description: str, title of the course
+  - name: program_title
+    description: str, title of the program
+  - name: program_id
+    description: int, foreign key representing a single program
+    tests:
+    - not_null
+  - name: course_readable_id
+    description: str, Open edX ID formatted as course-v1:{org}+{course code} e.g.
+      course-v1:xPRO+MLx2
+  - name: program_readable_id
+    description: str, readable ID from xpro or mitxonline formatted as program-v1:{org}+{program
+      code} e.g.program-v1:xPRO+MLx
+  tests:
+  - dbt_expectations.expect_compound_columns_to_be_unique:
+      column_list: ["platform", "program_id", "course_readable_id"]
+
 - name: marts__combined__users
   description: Mart model for users from different platforms
   columns:

src/ol_dbt/models/marts/combined/marts__combined_coursesinprogram.sql

@@ -0,0 +1,60 @@
+with mitx_programs as (
+    select * from {{ ref('int__mitx__program_requirements') }}
+)
+
+, mitx__courses as (
+    select * from {{ ref('int__mitx__courses') }}
+)
+
+, mitxpro__courses as (
+    select * from {{ ref('int__mitxpro__courses') }}
+)
+
+, mitxpro__programs as (
+    select * from {{ ref('int__mitxpro__programs') }}
+)
+
+, mitxonline__programs as (
+    select * from {{ ref('int__mitxonline__programs') }}
+)
+
+select
+    'MITx Online' as platform
+    , mitx__courses.course_title
+    , mitx_programs.program_title
+    , mitx_programs.mitxonline_program_id as program_id
+    , mitx__courses.course_readable_id
+    , mitxonline__programs.program_readable_id
+from mitx_programs
+inner join mitx__courses
+    on mitx_programs.course_number = mitx__courses.course_number
+left join mitxonline__programs
+    on mitx_programs.mitxonline_program_id = mitxonline__programs.program_id
+where mitx__courses.is_on_mitxonline = true
+
+union all
+
+select
+    'edX.org' as platform
+    , mitx__courses.course_title
+    , mitx_programs.program_title
+    , mitx_programs.micromasters_program_id as program_id
+    , mitx__courses.course_readable_id
+    , null as program_readable_id
+from mitx_programs
+inner join mitx__courses
+    on mitx_programs.course_number = mitx__courses.course_number
+where mitx__courses.is_on_mitxonline = false
+
+union all
+
+select
+    'xPro' as platform
+    , mitxpro__courses.course_title
+    , mitxpro__programs.program_title
+    , mitxpro__courses.program_id
+    , mitxpro__courses.course_readable_id
+    , mitxpro__programs.program_readable_id
+from mitxpro__courses
+inner join mitxpro__programs
+    on mitxpro__courses.program_id = mitxpro__programs.program_id