82 lines
2.5 KiB
C#
82 lines
2.5 KiB
C#
using System.ComponentModel.DataAnnotations;
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using Microsoft.EntityFrameworkCore;
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namespace DramaLing.Api.Models.Entities;
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/// <summary>
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/// 選項詞彙庫實體 - 用於生成測驗選項的詞彙資料庫
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/// </summary>
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[Index(nameof(Word), IsUnique = true, Name = "IX_OptionsVocabulary_Word")]
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[Index(nameof(CEFRLevel), Name = "IX_OptionsVocabulary_CEFR")]
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[Index(nameof(PartOfSpeech), Name = "IX_OptionsVocabulary_PartOfSpeech")]
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[Index(nameof(WordLength), Name = "IX_OptionsVocabulary_WordLength")]
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[Index(nameof(IsActive), Name = "IX_OptionsVocabulary_Active")]
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[Index(nameof(CEFRLevel), nameof(PartOfSpeech), nameof(WordLength), Name = "IX_OptionsVocabulary_Core_Matching")]
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public class OptionsVocabulary
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{
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/// <summary>
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/// 主鍵
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/// </summary>
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public Guid Id { get; set; }
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/// <summary>
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/// 詞彙內容
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/// </summary>
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[Required]
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[MaxLength(100)]
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public string Word { get; set; } = string.Empty;
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/// <summary>
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/// CEFR 難度等級 (A1, A2, B1, B2, C1, C2)
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/// </summary>
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[Required]
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[MaxLength(2)]
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[RegularExpression("^(A1|A2|B1|B2|C1|C2)$",
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ErrorMessage = "CEFR等級必須為A1, A2, B1, B2, C1, C2之一")]
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public string CEFRLevel { get; set; } = string.Empty;
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/// <summary>
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/// 詞性 (noun, verb, adjective, adverb, pronoun, preposition, conjunction, interjection, idiom)
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/// </summary>
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[Required]
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[MaxLength(20)]
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[RegularExpression("^(noun|verb|adjective|adverb|pronoun|preposition|conjunction|interjection|idiom)$",
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ErrorMessage = "詞性必須為有效值")]
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public string PartOfSpeech { get; set; } = string.Empty;
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/// <summary>
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/// 字數（字元長度）- 自動從 Word 計算
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/// </summary>
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public int WordLength { get; set; }
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/// <summary>
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/// 是否啟用
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/// </summary>
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public bool IsActive { get; set; } = true;
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/// <summary>
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/// 創建時間
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/// </summary>
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public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
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/// <summary>
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/// 更新時間
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/// </summary>
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public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;
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/// <summary>
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/// 自動計算字數
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/// </summary>
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public void CalculateWordLength()
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{
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WordLength = Word?.Length ?? 0;
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}
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/// <summary>
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/// 更新時間戳
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/// </summary>
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public void UpdateTimestamp()
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{
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UpdatedAt = DateTime.UtcNow;
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}
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} |