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@@ -0,0 +1,50 @@
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+<?php
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+
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+namespace App\Models;
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+
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+use Illuminate\Database\Eloquent\Model;
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+
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+class Textbook extends Model
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+{
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+ protected $table = 'textbooks';
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+
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+ protected $fillable = [
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+ 'series_id',
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+ 'stage',
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+ 'schooling_system',
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+ 'grade',
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+ 'semester',
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+ 'naming_scheme',
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+ 'track',
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+ 'module_type',
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+ 'volume_no',
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+ 'legacy_code',
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+ 'curriculum_standard_year',
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+ 'curriculum_revision_year',
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+ 'approval_authority',
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+ 'approval_year',
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+ 'edition_label',
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+ 'official_title',
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+ 'display_title',
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+ 'aliases',
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+ 'isbn',
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+ 'cover_path',
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+ 'status',
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+ 'sort_order',
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+ 'meta',
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+ ];
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+
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+ protected $casts = [
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+ // 移除 array cast，直接使用 JSON 字符串
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+ ];
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+
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+ public function series()
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+ {
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+ return $this->belongsTo(TextbookSeries::class);
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+ }
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+
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+ public function catalogs()
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+ {
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+ return $this->hasMany(TextbookCatalog::class);
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+ }
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+}
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