Create dim_platform model (#1364)

* create dim_platform model

* update description

* add OCW and remove extra space

* update id and add missing seed file definition

* remove cast

src/ol_dbt/models/dimensional/_dim__models.yml

@@ -0,0 +1,26 @@
+---
+version: 2
+
+models:
+- name: dim_platform
+  description: Platform information about the technical system that a given event
+    is executed within the context of.
+  columns:
+  - name: platform_id
+    description: string, primary key for this table
+    tests:
+    - not_null
+    - unique
+  - name: platform_name
+    description: string, name of the platform
+    tests:
+    - not_null
+    - unique
+  - name: platform_description
+    description: string, description of the platform
+    tests:
+    - not_null
+  - name: platform_domain
+    description: string, domain name of the platform, e.g. mitxonline.mit.edu
+    tests:
+    - not_null

src/ol_dbt/models/dimensional/dim_platform.sql

@@ -0,0 +1,10 @@
+with platforms as (
+    select * from {{ ref('platforms') }}
+)
+
+select
+    {{ generate_hash_id('id') }} as platform_id
+    , platform_name
+    , platform_description
+    , platform_domain
+from platforms

src/ol_dbt/seeds/_seed_doc.yml

@@ -16,3 +16,26 @@ seeds:
     description: str, organization that lists the course. e.g. MITx, MITxT
   - name: platform
     description: str, MITx Online or edX.org
+
+- name: platforms
+  description: Platform information about the technical system that a given event
+    is executed within the context of.
+  columns:
+  - name: id
+    description: string, unique identifier for the platform, e.g., mitxonline
+    tests:
+    - not_null
+    - unique
+  - name: platform_name
+    description: string, name of the platform
+    tests:
+    - not_null
+    - unique
+  - name: platform_description
+    description: string, description of the platform
+    tests:
+    - not_null
+  - name: platform_domain
+    description: string, domain name of the platform, e.g. mitxonline.mit.edu
+    tests:
+    - not_null

src/ol_dbt/seeds/platforms.csv

@@ -0,0 +1,7 @@
+id,platform_name,platform_description,platform_domain
+mitxonline,MITx Online,Online courses from MIT faculty and instructors,mitxonline.mit.edu
+edxorg,edX.org,MIT Online courses on edX.org,www.edx.org
+mitxpro,MIT xPRO,MIT Professional development courses and programs that build skills and augment careers,xpro.mit.edu
+residential,MITx Residential,MITx Residential,lms.mitx.mit.edu
+bootcamps,MIT Bootcamps,MIT Bootcamps,bootcamp.odl.mit.edu
+ocw,OCW,MIT Open Course Ware,ocw.mit.edu