#399

backend/app/controllers/post_imports_controller.rb

@@ -79,7 +79,7 @@ class PostImportsController < ApplicationController
     raise ArgumentError, '取込件数が多すぎます．' if rows.length > PostImportSourceParser::MAX_ROWS
 
     rows.map do |row|
-      value = ActionController::Parameters.new(row).permit(:source_row, :sourceRow, :url,
+      value = ActionController::Parameters.new(row).permit(:source_row, :sourceRow, :url, :metadata_url, :metadataUrl,
                                                             attributes: {}, provenance: {}, tag_sources: {},
                                                             fetch_warnings: [], validation_warnings: [])
       normalised = value.to_h.deep_transform_keys { _1.to_s.underscore }
@@ -100,6 +100,12 @@ class PostImportsController < ApplicationController
           (normalised['tag_sources'].keys - ['automatic', 'mapped', 'fixed', 'manual']).present?)
         raise ArgumentError, 'タグ由来の形式が不正です．'
       end
+      if normalised['tag_sources'].present? &&
+         (!normalised['tag_sources'].values.all?(String) ||
+          normalised['tag_sources'].values.any? { _1.bytesize > PostImportSourceParser::MAX_CELL_BYTES } ||
+          normalised['tag_sources'].values.sum(&:bytesize) > PostImportSourceParser::MAX_CELL_BYTES)
+        raise ArgumentError, 'タグ由来が大きすぎます．'
+      end
 
       normalised.symbolize_keys
     end

backend/app/services/post_import_google_sheets_fetcher.rb

@@ -25,7 +25,8 @@ class PostImportGoogleSheetsFetcher
 
     response.body
   rescue Preview::UrlSafety::UnsafeUrl, Preview::HttpFetcher::FetchFailed => e
-    raise ArgumentError, "スプレッドシートを取得できませんでした．ウェブ公開 URL を確認するか、ファイル保存又はコピー貼付けを使用してください: #{ e.message }"
+    Rails.logger.info("post_import_google_sheets_fetch_failure #{ { error: e.class.name, message: e.message }.to_json }")
+    raise ArgumentError, 'スプレッドシートを取得できませんでした．ウェブ公開 URL を確認するか、ファイル保存又はコピー貼付けを使用してください．'
   end
 
   private

backend/app/services/post_import_previewer.rb

@@ -22,11 +22,20 @@ class PostImportPreviewer
       tag_sources = row[:tag_sources]&.stringify_keys || initial_tag_sources(attributes, provenance)
       tag_sources['manual'] = attributes['tags'].to_s if provenance['tags'] == 'manual'
       url = row[:url].presence || values[@url_column].to_s.strip
+      url_for_metadata = normalised_url(url) || url
+      url_changed = row[:metadata_url].present? && row[:metadata_url] != url_for_metadata
+      clear_automatic_values!(attributes, provenance, tag_sources) if url_changed
       provenance['url'] ||= row[:url].present? ? 'manual' : 'mapped'
       attributes['url'] = url
       fetch_warnings = Array(row[:fetch_warnings]).dup
-      should_fetch = fetch_metadata == true || fetch_metadata.to_i == row[:source_row].to_i
+      should_fetch =
-      metadata, fetch_warnings = metadata_for(url, should_fetch, metadata_cache, fetch_warnings)
+          case fetch_metadata
+          when true then true
+          when Integer then fetch_metadata == row[:source_row].to_i
+          when false, nil then false
+          else raise ArgumentError, 'メタデータ取得対象が不正です．'
+          end
+      metadata, fetch_warnings = metadata_for(url_for_metadata, should_fetch, metadata_cache, fetch_warnings)
       metadata.each do |field, value|
         if field == 'tags' && provenance[field] != 'manual'
           tag_sources['automatic'] = value.to_s
@@ -49,12 +58,14 @@ class PostImportPreviewer
         @existing == 'error' ? errors[:url] = ['既存投稿です．'] : validation_warnings << '既存投稿のためスキップします．'
       end
       validate_basic_data(attributes, errors)
-      validate_preview_tags(merged_tags(tag_sources), errors, validation_warnings)
+      validate_preview_tags(merged_tags(tag_sources, provenance['tags']), errors, validation_warnings)
       validate_parents(attributes['parent_post_ids'], errors)
       attributes.delete('url')
-      attributes['tags'] = merged_tags(tag_sources)
+      attributes['tags'] = merged_tags(tag_sources, provenance['tags'])
       { source_row: row[:source_row], url: normal_url || url, attributes:, provenance:, tag_sources:,
-        fetch_warnings:, validation_warnings:, warnings: fetch_warnings + validation_warnings, errors:,
+        metadata_url: url_for_metadata,
+        fetch_warnings:, validation_warnings:, warnings: fetch_warnings + validation_warnings,
+        validation_errors: errors,
         status: errors.present? ? 'error' : ((fetch_warnings + validation_warnings).present? ? 'warning' : 'ready'),
         existing: normal_url.present? && Post.exists?(url: normal_url) }
     end
@@ -66,6 +77,12 @@ class PostImportPreviewer
     cache[url] ||= fetch_metadata(url)
   end
 
+  def normalised_url value
+    post = Post.new(url: value)
+    post.valid?
+    post.url if post.errors[:url].empty?
+  end
+
   private
 
   def mapped_value field, values
@@ -97,10 +114,19 @@ class PostImportPreviewer
       'fixed' => origin == 'fixed' ? attributes['tags'].to_s : '', 'manual' => '' }
   end
 
-  def merged_tags sources
+  def merged_tags sources, origin = nil
+    return sources['manual'].to_s if origin == 'manual'
+
     %w[automatic mapped fixed manual].flat_map { sources[_1].to_s.split }.uniq.join(' ')
   end
 
+  def clear_automatic_values! attributes, provenance, tag_sources
+    %w[title thumbnail_base original_created_from original_created_before duration].each do |field|
+      attributes[field] = '' if provenance[field] == 'automatic'
+    end
+    tag_sources['automatic'] = ''
+  end
+
   def fetch_metadata url
     return [{ }, ['URL が空です．']] if url.blank?
 
@@ -110,7 +136,8 @@ class PostImportPreviewer
     warnings << 'サムネールを取得できませんでした．' if data['thumbnail_base'].blank?
     [data.compact, warnings]
   rescue Preview::UrlSafety::UnsafeUrl, Preview::HttpFetcher::FetchFailed, Preview::HttpFetcher::ResponseTooLarge => e
-    [{ }, ["メタデータを取得できませんでした: #{ e.message }"]]
+    Rails.logger.info("post_import_metadata_fetch_failure #{ { error: e.class.name, message: e.message }.to_json }")
+    [{ }, ['メタデータを取得できませんでした．']]
   end
 
   def validate_preview_tags raw, errors, warnings

backend/app/services/post_import_runner.rb

@@ -18,17 +18,22 @@ class PostImportRunner
   private
 
   def run_row row
+    validate_row_structure!(row)
     attributes = row.fetch('attributes', { }).to_h.transform_keys { _1.to_s.underscore }
     raise ArgumentError, '取込項目が不正です．' unless (attributes.keys - ATTRIBUTE_KEYS).empty?
     raise ArgumentError, '取込項目が大きすぎます．' if attributes.values.any? { _1.to_s.bytesize > PostImportSourceParser::MAX_CELL_BYTES }
     raise ArgumentError, 'URL が長すぎます．' if row['url'].to_s.bytesize > PostImportSourceParser::MAX_CELL_BYTES
+    validate_tag_sources!(row['tag_sources'])
     preview = PostImportPreviewer.new(parsed: { columns: [], rows: [] }, url_column: 0,
                                       mappings: {}, existing: @existing).preview_rows(
                                           rows: [{ source_row: row['source_row'], url: row['url'],
                                                    attributes:, provenance: row['provenance'],
                                                    tag_sources: row['tag_sources'] }],
                                           fetch_metadata: false).first
-    return { source_row: row['source_row'], status: 'failed', errors: preview[:errors] } if preview[:errors].present?
+    if preview[:validation_errors].present?
+      return { source_row: row['source_row'], status: 'failed',
+               errors: preview[:validation_errors] }
+    end
     return row.slice('source_row').merge(status: 'skipped') if @existing == 'skip' && preview[:existing]
     attributes['tags'] = preview[:attributes]['tags']
     attributes['url'] = row['url']
@@ -46,4 +51,26 @@ class PostImportRunner
     Rails.logger.error("post_import_runner_failure #{ { error: e.class.name, message: e.message }.to_json }")
     { source_row: row['source_row'], status: 'failed', errors: { base: ['登録中にエラーが発生しました．'] } }
   end
+
+  def validate_tag_sources! sources
+    return if sources.blank?
+
+    sources = sources.to_h
+    raise ArgumentError unless (sources.keys - %w[automatic mapped fixed manual]).empty?
+    raise ArgumentError unless sources.values.all?(String)
+    raise ArgumentError if sources.values.any? { _1.bytesize > PostImportSourceParser::MAX_CELL_BYTES }
+    raise ArgumentError if sources.values.sum(&:bytesize) > PostImportSourceParser::MAX_CELL_BYTES
+  end
+
+  def validate_row_structure! row
+    provenance = row['provenance']
+    raise ArgumentError unless provenance.is_a?(Hash)
+    allowed = ATTRIBUTE_KEYS + ['url']
+    raise ArgumentError unless (provenance.keys - allowed).empty?
+    raise ArgumentError unless provenance.values.all? { _1.in?(['automatic', 'mapped', 'fixed', 'manual']) }
+    metadata_url = row['metadata_url']
+    raise ArgumentError unless metadata_url.nil? || metadata_url.is_a?(String)
+    raise ArgumentError if metadata_url.to_s.bytesize > PostImportSourceParser::MAX_CELL_BYTES
+    raise ArgumentError if row.to_json.bytesize > PostImportSourceParser::MAX_BYTES
+  end
 end

backend/app/services/post_import_source_parser.rb

@@ -4,6 +4,7 @@ class PostImportSourceParser
   MAX_ROWS = 100
   MAX_BYTES = 1.megabyte
   MAX_CELL_BYTES = 20.kilobytes
+  MAX_COLUMNS = 50
 
   def initialize source:, format:, has_header: false, json_path: nil
     @source = source.to_s
@@ -28,8 +29,9 @@ class PostImportSourceParser
     headers = @has_header ? table.shift : nil
     ensure_limits!(table)
     width = table.map(&:length).max.to_i
+    raise ArgumentError, "列数は #{ MAX_COLUMNS } 列までです．" if width > MAX_COLUMNS
     { columns: (0...width).map { |index| { key: index.to_s,
-                                          label: "#{ ('A'.ord + index).chr }：#{ headers&.[](index).presence || '列' }" } },
+                                          label: "#{ column_name(index) }：#{ headers&.[](index).presence || '列' }" } },
       rows: table.each_with_index.map { |values, index| { source_row: index + (@has_header ? 2 : 1), values: } } }
   rescue CSV::MalformedCSVError => e
     raise ArgumentError, "CSV・TSV の形式が不正です: #{ e.message }"
@@ -41,10 +43,18 @@ class PostImportSourceParser
     raise ArgumentError, 'JSON の投稿候補は配列にしてください．' unless value.is_a?(Array)
 
     ensure_limits!(value)
-    keys = value.grep(Hash).flat_map(&:keys).map(&:to_s).uniq
+    unless value.all?(Hash)
-    { columns: keys.each_with_index.map { |key, index| { key:, label: "#{ ('A'.ord + index).chr }：#{ key }" } },
+      invalid = value.each_with_index.filter_map { |item, index| index + 1 unless item.is_a?(Hash) }
+      raise ArgumentError, "JSON の投稿候補は object の配列にしてください: 行 #{ invalid.join(', ') }"
+    end
+    keys = value.flat_map(&:keys).map(&:to_s).uniq
+    raise ArgumentError, "列数は #{ MAX_COLUMNS } 列までです．" if keys.length > MAX_COLUMNS
+    { columns: keys.each_with_index.map { |key, index| { key:, label: "#{ column_name(index) }：#{ key }" } },
       rows: value.each_with_index.map { |item, index| { source_row: index + 1,
-                                                         values: keys.map { item.is_a?(Hash) ? item[_1] || item[_1.to_sym] : nil } } } }
+                                                         values: keys.map { |key|
+                                                           value = item.key?(key) ? item[key] : item[key.to_sym]
+                                                           json_cell(value)
+                                                         } } } }
   rescue JSON::ParserError, KeyError, ArgumentError => e
     raise ArgumentError, "JSON の形式が不正です: #{ e.message }"
   end
@@ -53,4 +63,23 @@ class PostImportSourceParser
     raise ArgumentError, "取込件数は #{ MAX_ROWS } 件までです．" if rows.length > MAX_ROWS
     raise ArgumentError, 'セルが大きすぎます．' if rows.flatten.any? { _1.to_s.bytesize > MAX_CELL_BYTES }
   end
+
+  def json_cell value
+    case value
+    when nil then ''
+    when String, Numeric, TrueClass, FalseClass then value.to_s
+    when Array, Hash then JSON.generate(value)
+    else raise ArgumentError, 'JSON のセル値が不正です．'
+    end
+  end
+
+  def column_name index
+    name = +''
+    loop do
+      name.prepend((65 + (index % 26)).chr)
+      index = (index / 26) - 1
+      break if index < 0
+    end
+    name
+  end
 end

backend/app/services/post_metadata_fetcher.rb

@@ -37,7 +37,8 @@ class PostMetadataFetcher
              when /\A\d{4}-\d{2}-\d{2}T\d{2}#{ zone }\z/ then from + 1.hour
              when /\A\d{4}-\d{2}-\d{2}T\d{2}:\d{2}#{ zone }\z/ then from + 1.minute
              when /\A\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}#{ zone }\z/ then from + 1.second
-             when /\A\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+#{ zone }\z/ then from + 0.001
+             when /\A\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.(\d+)#{ zone }\z/
+               from + (10**(-Regexp.last_match(1).length))
              else return nil
              end
     [from, before]

frontend/src/pages/posts/PostImportPage.tsx

@@ -26,14 +26,18 @@ type ImportRow = {
     url: string
     attributes: Record<string, string>
     warnings: string[]
-    errors: Record<string, string[]>
+    validationErrors: Record<string, string[]>
+    importErrors?: Record<string, string[]>
     provenance: Record<string, 'automatic' | 'mapped' | 'fixed' | 'manual'>
     tagSources?: Record<'automatic' | 'mapped' | 'fixed' | 'manual', string>
     status: 'ready' | 'warning' | 'error'
     existing: boolean
+    metadataUrl?: string
+    createdPostId?: number
     importStatus?: 'pending' | 'created' | 'skipped' | 'failed' }
 type ParsedImport = { columns: Column[], rows: { sourceRow: number, values: string[] }[] }
 type Phase = 'source' | 'mapping' | 'preview' | 'result'
+type ImportResultStatus = 'created' | 'skipped' | 'failed'
 
 
 const detectFormat = (source: string): 'csv' | 'tsv' =>
@@ -54,7 +58,7 @@ const PostImportPage: FC<Props> = ({ user }) => {
   const [parsed, setParsed] = useState<ParsedImport | null> (null)
   const [columns, setColumns] = useState<Column[]> ([])
   const [rows, setRows] = useState<ImportRow[]> ([])
-  const [results, setResults] = useState<{ sourceRow: number, status: string, post?: { id: number }, errors?: Record<string, string[]> }[]> ([])
+  const [results, setResults] = useState<{ sourceRow: number, status: ImportResultStatus, post?: { id: number }, errors?: Record<string, string[]> }[]> ([])
   const [mappings, setMappings] = useState<Record<string, { columns: string[] }>> ({ })
   const [existing, setExisting] = useState<'skip' | 'error'> ('skip')
   const [loading, setLoading] = useState (false)
@@ -73,6 +77,10 @@ const PostImportPage: FC<Props> = ({ user }) => {
         existing })
       setColumns (data.columns)
       setParsed (data)
+      setMappings ({ })
+      setRows ([])
+      setResults ([])
+      setUrlColumn ('')
       if (data.columns.length === 1)
         setUrlColumn ('0')
       else
@@ -106,7 +114,7 @@ const PostImportPage: FC<Props> = ({ user }) => {
         url_column: urlColumn,
         mappings,
         existing })
-      setRows (data.rows)
+      setRows (current => mergeValidatedRows (current, data.rows))
       setPhase ('preview')
     }
     catch
@@ -119,11 +127,25 @@ const PostImportPage: FC<Props> = ({ user }) => {
     }
   }
 
+  const mergeValidatedRows = (current: ImportRow[], validated: ImportRow[]): ImportRow[] =>
+      current.map (previous => {
+        if (previous.importStatus === 'created')
+          return previous
+        const row = validated.find (_1 => _1.sourceRow === previous.sourceRow)
+        return row ? { ...row,
+                       importStatus: previous.importStatus,
+                       createdPostId: previous.createdPostId,
+                       importErrors: previous.importErrors,
+                       validationErrors: row.validationErrors ?? { } } : previous
+      }).concat (validated.filter (row => !current.some (_1 => _1.sourceRow === row.sourceRow)))
+
   const updateAttribute = async (index: number, field: string, value: string) => {
     const row = rows[index]
     const next = { ...row,
                    attributes: { ...row.attributes, [field]: value },
-                   provenance: { ...row.provenance, [field]: 'manual' } }
+                   provenance: { ...row.provenance, [field]: 'manual' },
+                   importStatus: 'pending' as const,
+                   importErrors: undefined }
     const nextRows = rows.map ((currentRow, rowIndex) => rowIndex === index ? next : currentRow)
     setRows (nextRows)
     const generation = ++validationGeneration.current
@@ -131,10 +153,10 @@ const PostImportPage: FC<Props> = ({ user }) => {
     try
     {
       const validated = await apiPost<{ rows: ImportRow[] }> ('/posts/import/validate',
-                                                                { rows: nextRows, existing,
+                                                                { rows: nextRows.filter (row => row.importStatus !== 'created'), existing,
                                                                   changed_row: -1 })
       if (generation === validationGeneration.current)
-        setRows (validated.rows)
+        setRows (current => mergeValidatedRows (current, validated.rows))
     }
     catch
     {
@@ -149,7 +171,8 @@ const PostImportPage: FC<Props> = ({ user }) => {
 
   const updateURL = async (index: number, value: string) => {
     const row = rows[index]
-    const next = { ...row, url: value, provenance: { ...row.provenance, url: 'manual' } }
+    const next = { ...row, url: value, provenance: { ...row.provenance, url: 'manual' },
+                   importStatus: 'pending' as const, importErrors: undefined }
     const nextRows = rows.map ((currentRow, rowIndex) => rowIndex === index ? next : currentRow)
     setRows (nextRows)
     const generation = ++validationGeneration.current
@@ -157,10 +180,10 @@ const PostImportPage: FC<Props> = ({ user }) => {
     try
     {
       const validated = await apiPost<{ rows: ImportRow[] }> ('/posts/import/validate',
-                                                                { rows: nextRows, existing,
+                                                                { rows: nextRows.filter (row => row.importStatus !== 'created'), existing,
                                                                   changed_row: row.sourceRow })
       if (generation === validationGeneration.current)
-        setRows (validated.rows)
+        setRows (current => mergeValidatedRows (current, validated.rows))
     }
     catch
     {
@@ -173,6 +196,27 @@ const PostImportPage: FC<Props> = ({ user }) => {
     }
   }
 
+  const updateExisting = async (value: 'skip' | 'error') => {
+    setExisting (value)
+    const pendingRows = rows.map (row => row.importStatus === 'created' ? row :
+        { ...row, importStatus: 'pending' as const, importErrors: undefined })
+    setRows (pendingRows)
+    const generation = ++validationGeneration.current
+    setLoading (true)
+    try
+    {
+      const validated = await apiPost<{ rows: ImportRow[] }> ('/posts/import/validate',
+                                                                { rows: pendingRows.filter (row => row.importStatus !== 'created'), existing: value, changed_row: -1 })
+      if (generation === validationGeneration.current)
+        setRows (current => mergeValidatedRows (current, validated.rows))
+    }
+    finally
+    {
+      if (generation === validationGeneration.current)
+        setLoading (false)
+    }
+  }
+
   const submit = async () => {
     const targets = rows.filter (row => (row as ImportRow & { importStatus?: string }).importStatus !== 'created')
     if (targets.length === 0)
@@ -181,14 +225,19 @@ const PostImportPage: FC<Props> = ({ user }) => {
     try
     {
       const result = await apiPost<{ created: number, skipped: number, failed: number,
-                                     rows: { sourceRow: number, status: string, post?: { id: number }, errors?: Record<string, string[]> }[] }> ('/posts/import', { rows: targets, existing })
+                                     rows: { sourceRow: number, status: ImportResultStatus, post?: { id: number }, errors?: Record<string, string[]> }[] }> ('/posts/import', { rows: targets, existing })
+      if (result.rows.some (row => !(['created', 'skipped', 'failed'] as string[]).includes (row.status)))
+        throw new Error ('不正な登録結果です。')
       toast ({ title: `登録完了: ${result.created} 件`,
               description: `スキップ ${result.skipped} 件、失敗 ${result.failed} 件` })
       setPhase ('result')
       setResults (result.rows)
       setRows (current => current.map (row => {
         const resultRow = result.rows.find (_1 => _1.sourceRow === row.sourceRow)
-        return resultRow ? { ...row, importStatus: resultRow.status } : row
+        return resultRow ? { ...row, importStatus: resultRow.status,
+                             createdPostId: resultRow.post?.id,
+                             importErrors: resultRow.errors,
+                             validationErrors: row.validationErrors } : row
       }))
     }
     catch
@@ -269,7 +318,7 @@ const PostImportPage: FC<Props> = ({ user }) => {
 		<label>URL 列 <select value={urlColumn} onChange={ev => setUrlColumn (ev.target.value)}>
 		  {columns.map ((column, index) => <option key={column.key} value={index}>{column.label}</option>)}
 		</select></label>
-		<label>既存投稿 <select value={existing} onChange={ev => setExisting (ev.target.value as typeof existing)}>
+        <label>既存投稿 <select value={existing} onChange={ev => updateExisting (ev.target.value as typeof existing)}>
 		  <option value="skip">スキップ</option><option value="error">エラー</option>
 		</select></label>
 		{['title', 'thumbnail_base', 'original_created_from', 'original_created_before', 'duration', 'tags', 'parent_post_ids'].map (field =>
@@ -286,6 +335,7 @@ const PostImportPage: FC<Props> = ({ user }) => {
 	    <div className="space-y-3"><p>インポート処理が完了しました。</p>
 	      {results.map (result => <div key={result.sourceRow} className="rounded border p-2 dark:border-neutral-700">行 {result.sourceRow}：{result.status} {result.post && <PrefetchLink to={`/posts/${result.post.id}`}>投稿を開く</PrefetchLink>}<FieldError messages={Object.values (result.errors ?? { }).flat ()}/></div>)}
 	      <Button type="button" onClick={() => setPhase ('preview')}>結果を確認</Button>
+	      <Button type="button" variant="outline" onClick={() => setPhase ('preview')}>失敗行を修正</Button>
 	      <Button type="button" variant="outline" onClick={() => setPhase ('source')}>新しい入力元を選ぶ</Button>
 	    </div>)}
 	</MainArea>)
@@ -295,16 +345,20 @@ const PostImportPage: FC<Props> = ({ user }) => {
 const RowCard = ({ row, index, update, updateURL }: { row: ImportRow, index: number, update: (index: number, field: string, value: string) => void, updateURL: (index: number, value: string) => void }) => (
     <article className="space-y-2 rounded border bg-white p-3 text-neutral-900 dark:border-neutral-700 dark:bg-neutral-900 dark:text-neutral-100">
 	<p>行 {row.sourceRow}・{row.status}</p>
+	{row.importStatus === 'created' ? <p className="rounded bg-green-100 p-2 dark:bg-green-900">登録済み。この行は編集・再登録できません。{row.createdPostId && <PrefetchLink to={`/posts/${row.createdPostId}`}>投稿を開く</PrefetchLink>}</p> : <>
 	<EditableValue label="URL" value={row.url} origin={row.provenance.url} onCommit={value => updateURL (index, value)}/>
 	<EditableValue label="タイトル" value={row.attributes.title ?? ''} origin={row.provenance.title} onCommit={value => update (index, 'title', value)}/>
 	<EditableValue label="サムネール基底 URL" value={row.attributes.thumbnailBase ?? ''} origin={row.provenance.thumbnailBase} onCommit={value => update (index, 'thumbnailBase', value)}/>
-	{row.attributes.thumbnailBase && <img src={row.attributes.thumbnailBase} alt="サムネール" className="max-h-32" onError={ev => { ev.currentTarget.hidden = true }}/>} 
+	<ThumbnailPreview url={row.attributes.thumbnailBase ?? ''}/>
 	<EditableValue label="作成日時 From" value={row.attributes.originalCreatedFrom ?? ''} origin={row.provenance.originalCreatedFrom} onCommit={value => update (index, 'originalCreatedFrom', value)}/>
 	<EditableValue label="作成日時 Before" value={row.attributes.originalCreatedBefore ?? ''} origin={row.provenance.originalCreatedBefore} onCommit={value => update (index, 'originalCreatedBefore', value)}/>
 	<EditableValue label="動画時間" value={String (row.attributes.duration ?? '')} origin={row.provenance.duration} onCommit={value => update (index, 'duration', value)}/>
 	<EditableValue label="タグ" value={row.attributes.tags ?? ''} origin={row.provenance.tags} onCommit={value => update (index, 'tags', value)}/>
 	<EditableValue label="親投稿" value={row.attributes.parentPostIds ?? ''} origin={row.provenance.parentPostIds} onCommit={value => update (index, 'parentPostIds', value)}/>
-	<FieldError messages={[...row.warnings, ...Object.values (row.errors).flat ()]}/>
+	</>}
+	<FieldError messages={[...row.warnings,
+				 ...Object.values (row.validationErrors ?? { }).flat (),
+				 ...Object.values (row.importErrors ?? { }).flat ()]}/>
     </article>)
 
 const EditableValue = ({ label, value, origin, onCommit }: { label: string, value: string, origin: string | undefined, onCommit: (value: string) => void }) => {
@@ -324,4 +378,14 @@ const EditableValue = ({ label, value, origin, onCommit }: { label: string, valu
   </div>
 }
 
+const ThumbnailPreview = ({ url }: { url: string }) => {
+  const [failed, setFailed] = useState (false)
+  useEffect (() => setFailed (false), [url])
+  if (!url)
+    return <p className="text-sm">サムネール未指定</p>
+  if (failed)
+    return <p className="text-sm text-red-600 dark:text-red-300">サムネールを表示できません</p>
+  return <img src={url} alt="サムネール" className="max-h-32" onError={() => setFailed (true)}/>
+}
+
 export default PostImportPage