Add resources table

docs/db/schema.dbml

@@ -118,7 +118,7 @@ Table tags {
 Table tags_assigned {
   tag_id integer [primary key]
   assigned_id integer [primary key]
-  assigned_to enum [note: 'mentor, project, study_buddy']
+  assigned_to enum [note: 'mentor, project, study_buddy, resource']
 }
 
 Table links {
@@ -129,8 +129,31 @@ Table links {
   entity_id integer
 }
 
+Table resources {
+  id integer [primary key]
+  title varchar(255) [not null]
+  type resource_type [not null]
+  audience audience [not null]
+  description text
+  attachment_filename varchar(255)
+  link varchar(255)
+  created_by integer [ref: > users.id]
+  created_at timestamp
+  updated_at timestamp
+}
+Enum resource_type {
+  post
+  video
+  picture
+  link
+  file
+}
 
-
+Enum audience {
+  public
+  member
+  mentor
+}
 
 //Ref: applications.last_modified_by > users.id // many-to-one
 Ref: users.id <> user_roles.user_id // many-to-many
@@ -151,4 +174,5 @@ Ref: study_buddy.id <> users_learnings.learning_entity_id
 // links relationships: other resources to be added
 Ref: links.entity_id > projects.id
 
-Ref: "study_buddy"."id" < "study_buddy"."created_by"
+Ref: "study_buddy"."id" < "study_buddy"."created_by"
+Ref: resources.id <> tags_assigned.assigned_id

knex/migrations/20260307092657_create_resources_table.js

@@ -0,0 +1,84 @@
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.up = async function(knex) {
+  await knex.raw(`
+      DO $$ 
+      BEGIN
+        IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'resource_type') THEN
+          CREATE TYPE resource_type AS ENUM ('post', 'video', 'picture', 'link', 'file');
+        END IF;
+
+        IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = 'audience') THEN
+          CREATE TYPE audience AS ENUM ('public', 'member', 'mentor');
+        END IF;
+      END $$;
+    `);
+
+  // create resources 
+  await knex.schema.createTable('resources', function(table) {
+    table.increments('id').primary();
+    table.string('title', 255).notNullable();
+    table.specificType('type', 'resource_type').notNullable();
+    table.specificType('audience', 'audience').notNullable();
+    table.text('description');
+    table.string('attachment_filename', 255);
+    table.string('link', 255);
+    table.integer('created_by').references('id').inTable('users');
+    table.timestamp('created_at').defaultTo(knex.fn.now());
+    table.timestamp('updated_at').defaultTo(knex.fn.now());
+
+    //checks for certain fields
+    table.check('?? IS NOT NULL OR ?? IS NOT NULL OR ?? IS NOT NULL', 
+      ['description', 'attachment_filename', 'link']);
+  });
+
+  //adding contraints to resources
+  await knex.raw(`
+    ALTER TABLE resources 
+    ADD CONSTRAINT resources_type_description_check 
+    CHECK (
+      (type = 'post' AND description IS NOT NULL) OR 
+      (type != 'post')
+    );
+
+    ALTER TABLE resources 
+    ADD CONSTRAINT resources_type_video_check 
+    CHECK (
+      (type = 'video' AND link IS NOT NULL) OR 
+      (type != 'video')
+    );
+
+    ALTER TABLE resources 
+    ADD CONSTRAINT resources_type_picture_check 
+    CHECK (
+      (type = 'picture' AND (attachment_filename IS NOT NULL OR link IS NOT NULL)) OR 
+      (type != 'picture')
+    );
+
+    ALTER TABLE resources 
+    ADD CONSTRAINT resources_type_link_check 
+    CHECK (
+      (type = 'link' AND link IS NOT NULL) OR 
+      (type != 'link')
+    );
+
+    ALTER TABLE resources 
+    ADD CONSTRAINT resources_type_file_check 
+    CHECK (
+      (type = 'file' AND attachment_filename IS NOT NULL) OR 
+      (type != 'file')
+    );
+  `);
+};
+
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.down = async function(knex) {
+  await knex.schema.dropTableIfExists('resources');
+  await knex.raw('DROP TYPE IF EXISTS resource_type;');
+  await knex.raw('DROP TYPE IF EXISTS audience;');
+};

knex/migrations/20260307092839_update_tags_assigned.js

@@ -0,0 +1,29 @@
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.up = async function(knex) {
+  await knex.raw(`
+    ALTER TABLE tags_assigned 
+    DROP CONSTRAINT IF EXISTS tags_assigned_assigned_to_check;
+
+    ALTER TABLE tags_assigned 
+    ADD CONSTRAINT tags_assigned_assigned_to_check 
+    CHECK (assigned_to IN ('mentor', 'project', 'study_buddy', 'resource'));
+  `);
+};
+
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.down = async function(knex) {
+  await knex.raw(`
+    ALTER TABLE tags_assigned 
+    DROP CONSTRAINT IF EXISTS tags_assigned_assigned_to_check;
+
+    ALTER TABLE tags_assigned 
+    ADD CONSTRAINT tags_assigned_assigned_to_check 
+    CHECK (assigned_to IN ('mentor', 'project', 'study_buddy'));
+  `);
+};