core: Add subject column

acrate-core/migrations/2024-11-14-031744_meta/up.sql

@@ -2,8 +2,14 @@ CREATE TABLE IF NOT EXISTS meta_subjects (
 	id UUID DEFAULT gen_random_uuid(),
 	document BPCHAR NOT NULL,
 	pattern BPCHAR NOT NULL,
+	subject BPCHAR,
 	redirect BPCHAR,
 
+	CONSTRAINT either_subject_or_redirect_not_null CHECK (
+		(subject IS NOT NULL AND redirect IS NULL)
+		OR
+		(subject IS NULL AND redirect IS NOT NULL)
+	),
 	PRIMARY KEY (id)
 );
 

acrate-core/src/meta.rs

@@ -11,6 +11,7 @@ pub struct MetaSubject {
 	pub id: Uuid,
 	pub document: String,
 	pub pattern: String,
+	pub subject: Option<String>,
 	pub redirect: Option<String>,
 }
 

acrate-core/src/schema.rs

@@ -55,6 +55,7 @@ diesel::table! {
         id -> Uuid,
         document -> Bpchar,
         pattern -> Bpchar,
+        subject -> Nullable<Bpchar>,
         redirect -> Nullable<Bpchar>,
     }
 }