diff --git a/app/src/main/java/io/legado/app/data/dao/BookDao.kt b/app/src/main/java/io/legado/app/data/dao/BookDao.kt
index b6ad0ba40..6e71ae680 100644
--- a/app/src/main/java/io/legado/app/data/dao/BookDao.kt
+++ b/app/src/main/java/io/legado/app/data/dao/BookDao.kt
@@ -13,7 +13,7 @@ interface BookDao {
     @Query("SELECT * FROM books WHERE `group` = :group")
     fun observeByGroup(group: Int): DataSource.Factory<Int, Book>
 
-    @Query("SELECT url FROM books WHERE `group` = :group")
+    @Query("SELECT descUrl FROM books WHERE `group` = :group")
     fun observeUrlsByGroup(group: Int): LiveData<List<String>>
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/data/entities/Chapter.kt b/app/src/main/java/io/legado/app/data/entities/Chapter.kt
index b5ba5bf93..f69bb4ac0 100644
--- a/app/src/main/java/io/legado/app/data/entities/Chapter.kt
+++ b/app/src/main/java/io/legado/app/data/entities/Chapter.kt
@@ -2,6 +2,7 @@ package io.legado.app.data.entities
 
 import android.os.Parcelable
 import androidx.room.Entity
+import androidx.room.ForeignKey
 import androidx.room.Index
 import androidx.room.PrimaryKey
 import kotlinx.android.parcel.Parcelize
@@ -9,9 +10,8 @@ import kotlinx.android.parcel.Parcelize
 
 @Parcelize
 @Entity(tableName = "chapters",
-    indices = [(Index(value = ["url"]))])
+    indices = [(Index(value = ["feedId", "feedLink"], unique = true))])
 data class Chapter(@PrimaryKey
-                    var url: String = "",
                     var name: String = "",
                     var bookUrl: String = "",
                     var index: Int = 0,
diff --git a/app/src/main/java/io/legado/app/data/entities/Source.kt b/app/src/main/java/io/legado/app/data/entities/Source.kt
index feecd7295..5bac00ac0 100644
--- a/app/src/main/java/io/legado/app/data/entities/Source.kt
+++ b/app/src/main/java/io/legado/app/data/entities/Source.kt
@@ -1,2 +1,29 @@
 package io.legado.app.data.entities
 
+import android.os.Parcelable
+import androidx.room.Entity
+import androidx.room.Index
+import androidx.room.PrimaryKey
+import kotlinx.android.parcel.Parcelize
+
+@Parcelize
+@Entity(tableName = "sources",
+    indices = [(Index(value = ["id"]))])
+data class Source(@PrimaryKey
+                  var id: Int = 0,                          // 编号
+                  var host: String = "",                    // 地址，包括 http/https
+                  var name: String = "",                    // 名称
+                  var type: Int = 0,                        // 类型，0 文本，1 音频
+                  var group: String? = null,                // 分组
+                  var header: String? = null,               // header
+                  var loginUrl: String? = null,             // 登录地址
+                  var isEnabled: Boolean = true,            // 是否启用
+                  var lastUpdateTime: Long = 0,             // 最后更新时间，用于排序
+                  var serialNumber: Int = 0,                // 手动排序编号
+                  var weight: Int = 0,                      // 智能排序的权重
+                  var exploreRule: String? = null,          // 发现规则
+                  var searchRule: String? = null,           // 搜索规则
+                  var bookInfoRule: String? = null,         // 书籍信息页规则
+                  var tocRule: String? = null,              // 目录页规则
+                  var contentRule: String? = null           // 正文页规则
+                  ) : Parcelable
\ No newline at end of file