Add Include Attributes When Conditional Check Passes as a GROQ TIL

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1239 TILs and counting..._
+_1240 TILs and counting..._
 
 ---
 
@@ -344,6 +344,7 @@ _1239 TILs and counting..._
 
 - [Grab Multiple Values From A Reference](groq/grab-multiple-values-from-a-reference.md)
 - [Grab Values From An Array Of References](groq/grab-values-from-an-array-of-references.md)
+- [Include Attributes When Conditional Check Passes](groq/include-attributes-when-conditional-check-passes.md)
 - [Include Type Of Operation In Webhook Response](groq/include-type-of-operation-in-webhook-response.md)
 
 ### Heroku

groq/include-attributes-when-conditional-check-passes.md

@@ -0,0 +1,40 @@
+# Include Attributes When Conditional Check Passes
+
+The graph-like nature of Sanity means that you'll often be querying for data
+that spans a variety of document types. For instance, your front-end could be
+requesting content in the shape of a blog post, video, and podcast. Though
+there are some similarities, each of these document types will have some unique
+attributes.
+
+When using GROQ to query for data that spans different types of documents, you
+can use [a conditional query
+syntax](https://www.sanity.io/docs/query-cheat-sheet#64a36d80be73) to include
+type-specific attributes.
+
+```groq
+*[_type == 'blog' || _type == 'video' || _type == 'podcast'][]{
+  title,
+  'slug': slug.current,
+  _type == 'blog' => {
+    body,
+    read_time
+  },
+  _type == 'video' => {
+    description,
+    mp4_url
+  },
+  _type == 'podcast' => {
+    description,
+    mp3_url
+  }
+}
+```
+
+Notice that there are some attributes that are common across each type (i.e.
+`title` and `slug`). Each type then has attributes unique to its document type
+(i.e. `blog` has `body` and `read_time`).
+
+This conditional query syntax allows us to both define flexible schemas in
+Sanity and then query against that flexible schema.
+
+[source](https://www.youtube.com/watch?v=dCGPNkcTseQ)