#351

backend/app/models/post.rb

@@ -46,6 +46,7 @@ class Post < ApplicationRecord
   before_validation :normalise_url
 
   validates :url, presence: true, uniqueness: true
+  validates :video_ms, numericality: { only_integer: true, greater_than: 0 }, allow_nil: true
 
   validate :validate_original_created_range
   validate :url_must_be_http_url
@@ -94,12 +95,16 @@ class Post < ApplicationRecord
     s = total_s % 60
     min = (total_s / 60) % 60
     h = total_s / 3_600
+    remainder_ms = ms % 1_000
 
-    if h.positive?
-      '%d:%02d:%02d' % [h, min, s]
-    else
-      '%d:%02d' % [min, s]
-    end
+    base =
+        if h.positive?
+          '%d:%02d:%02d' % [h, min, s]
+        else
+          '%d:%02d' % [min, s]
+        end
+
+    remainder_ms.positive? ? "#{ base }.#{ remainder_ms.to_s.rjust(3, '0') }" : base
   end
 
   def snapshot_parent_post_ids = parents.order(:id).pluck(:id)

backend/app/models/post_version.rb

@@ -5,6 +5,7 @@ class PostVersion < ApplicationRecord
   belongs_to :parent, class_name: 'Post', optional: true
 
   validates :url, presence: true
+  validates :video_ms, numericality: { only_integer: true, greater_than: 0 }, allow_nil: true
 
   validate :validate_original_created_range
 

backend/app/models/tag.rb

@@ -131,6 +131,8 @@ class Tag < ApplicationRecord
       sections_by_tag = []
       while (match = name.match(/\A(\S*?)\[([^\[\]\s]*)-([^\[\]\s]*)\](\S*)\z/))
         name = "#{ match[1] }#{ match[4] }"
+        next if match[2].empty? && match[3].empty?
+
         sections_by_tag << normalise_section_range!(
             begin_raw: match[2],
             end_raw: match[3],
@@ -154,6 +156,7 @@ class Tag < ApplicationRecord
         sections[tag.id] ||= []
         sections[tag.id].concat(sections_by_tag)
         sections[tag.id] = merge_section_ranges(sections[tag.id])
+        sections.delete(tag.id) if sections[tag.id] == [[0, nil]]
       end
     end