add error messages, prevent creating record with existing id, use referenceField with filtering

Author: odama626

examples/content/markdown/authors/Adam.md

@@ -0,0 +1,9 @@
+---
+name: Adam
+friend: Amanda
+enjoys:
+  - cats
+  - coding
+  - flatbread
+---
+

examples/content/markdown/authors/Amanda.md

@@ -0,0 +1,8 @@
+---
+name: Amanda
+enjoys:
+  - cats
+  - coding
+  - flatbread
+---
+

examples/content/markdown/authors/daes.md

@@ -6,7 +6,7 @@ enjoys:
   - cats
   - coffee
   - design
-friend: 40s3
+friend: Eva
 date_joined: 2021-04-22T16:41:59.558Z
 skills:
   sitting: 304

examples/content/markdown/authors/eva.md

@@ -8,7 +8,7 @@ enjoys:
   - mow mow
   - sleepy time
   - attention
-friend: 2a3e
+friend: Tony
 image: eva.svg
 date_joined: 2002-02-25T16:41:59.558Z
 skills:

examples/content/markdown/authors/tony.md

@@ -6,7 +6,7 @@ enjoys:
   - cats
   - tea
   - making this
-friend: 40s3
+friend: Eva
 image: tony.svg
 date_joined: 2021-02-25T16:41:59.558Z
 skills:

examples/content/markdown/authors/yoshi.md

@@ -7,7 +7,7 @@ enjoys:
   - encroaching upon personal space
   - being concerned
   - smooth jazz
-friend: ab2c
+friend: Daes
 date_joined: 2018-10-25T16:23:59.558Z
 skills:
   sitting: 10

examples/content/markdown/posts/anotha-one.md

@@ -2,8 +2,8 @@
 id: 92348fds-453fdh-59ddsd-3332-09876
 title: 'Test post A'
 authors:
-  - 40s3
-  - 2a3e
+  - Eva
+  - Tony
 rating: 84.3
 ---
 

examples/content/markdown/posts/b.md

@@ -2,8 +2,8 @@
 id: 2348fds-563fdh-59ddsd-3332-09876
 title: 'Test post B'
 authors:
-  - 1111
-  - ab2c
+  - Ushi
+  - Daes
 rating: 44
 ---
 

examples/content/markdown/posts/example-post.md

@@ -2,8 +2,8 @@
 id: sdfsdf-23423-sdfsd-23444-dfghf
 title: 'Example post of things'
 authors:
-  - 2a3e
-  - 40s3
+  - Tony
+  - Eva
 rating: 74
 ---
 

examples/content/markdown/posts/soup.md

@@ -2,8 +2,7 @@
 id: jksfd4-234fdh-5345fj-3455-09836
 title: 'Soup Reflection'
 authors:
-  - r3c6
-  - ab2c
+  - Yoshi
 rating: 96
 ---