Use ->> instead of json_extract in queries

Improves readability of queries.

docs/database_structure.md

@@ -126,7 +126,7 @@ A view that extracts artist information from the embedded JSON in the records ta
 
 ```sql
 CREATE VIEW artist_records AS
-  SELECT json_extract(json_each.value, '$.musicbrainz_id') AS musicbrainz_id,
+  SELECT json_each.value ->> '$.musicbrainz_id' AS musicbrainz_id,
   records.id AS record_id,
   json_each.value as artist
   FROM records,
@@ -134,6 +134,7 @@ CREATE VIEW artist_records AS
 ```
 
 This view is crucial for querying artist information as it:
+
 - Extracts individual artists from the embedded JSON array in the records table
 - Provides a normalized view of the artist-record relationships
 - Makes it easier to query records by artist

lib/music_library/collection.ex

@@ -78,11 +78,11 @@ defmodule MusicLibrary.Collection do
     q =
       from r in fragment("records, json_each(records.artists)"),
         where: fragment("records.purchased_at IS NOT NULL"),
-        group_by: fragment("json_extract(?, '$.name')", r.value),
+        group_by: fragment("? ->> '$.name'", r.value),
         order_by: [desc: fragment("count(1)")],
         select: %{
-          id: fragment("json_extract(?, '$.musicbrainz_id')", r.value),
-          name: fragment("json_extract(?, '$.name')", r.value),
+          id: fragment("? ->> '$.musicbrainz_id'", r.value),
+          name: fragment("? ->> '$.name'", r.value),
           count: fragment("count(1)")
         },
         limit: ^limit

lib/music_library/records.ex

@@ -50,7 +50,7 @@ defmodule MusicLibrary.Records do
   defmacro order_alphabetically do
     quote do
       fragment(
-        "unaccent(json_extract(artists, '$[0].sort_name')) COLLATE NOCASE ASC, unaccent(title) COLLATE NOCASE ASC"
+        "unaccent(artists ->> '$[0].sort_name') COLLATE NOCASE ASC, unaccent(title) COLLATE NOCASE ASC"
       )
     end
   end

priv/repo/migrations/20241202095949_create_artist_records_view.exs

@@ -4,7 +4,7 @@ defmodule MusicLibrary.Repo.Migrations.CreateArtistRecordsView do
   def up do
     execute """
     CREATE VIEW artist_records AS
-      SELECT json_extract(json_each.value, '$.musicbrainz_id') AS musicbrainz_id, 
+      SELECT json_each.value ->> '$.musicbrainz_id' AS musicbrainz_id, 
       records.id AS record_id,
       json_each.value as artist
       FROM records,