diff --git a/.travis.yml b/.travis.yml
index 32426fcbe..ee0bf3765 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,15 @@
 language: java
 jdk:
   - oraclejdk8
+cache:
+  directories:
+    - .autoconf
+    - $HOME/.m2
 script:
   - mvn clean package -Pci
 branches:
   only:
     - master
 notifications:
-  webhooks: https://fathomless-fjord-24024.herokuapp.com/notify
+  webhooks:
+    - https://fathomless-fjord-24024.herokuapp.com/notify
diff --git a/src/main/java/cc/ryanc/halo/model/domain/Post.java b/src/main/java/cc/ryanc/halo/model/domain/Post.java
index 5d871abd2..3116de286 100755
--- a/src/main/java/cc/ryanc/halo/model/domain/Post.java
+++ b/src/main/java/cc/ryanc/halo/model/domain/Post.java
@@ -6,7 +6,6 @@ import com.fasterxml.jackson.annotation.JsonFormat;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import lombok.Data;
 import lombok.ToString;
-import org.hibernate.annotations.ColumnDefault;
 import org.springframework.data.annotation.LastModifiedDate;
 import org.springframework.data.jpa.domain.support.AuditingEntityListener;
 
diff --git a/src/main/java/cc/ryanc/halo/model/entity/Category.java b/src/main/java/cc/ryanc/halo/model/entity/Category.java
new file mode 100644
index 000000000..d18171e64
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/model/entity/Category.java
@@ -0,0 +1,53 @@
+package cc.ryanc.halo.model.entity;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+import org.hibernate.annotations.SQLDelete;
+import org.hibernate.annotations.Where;
+
+import javax.persistence.*;
+import java.util.Date;
+
+/**
+ * Category entity.
+ *
+ * @author johnniang
+ */
+@Entity
+@Table(name = "categories")
+@SQLDelete(sql = "update categories set deleted = true where id = ?")
+@Where(clause = "deleted = false")
+@Data
+@ToString
+@EqualsAndHashCode
+public class Category {
+
+    @Id
+    @GeneratedValue
+    private Integer id;
+
+    @Column(name = "create_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date createTime;
+
+    @Column(name = "update_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date updateTime;
+
+    @Column(name = "deleted", columnDefinition = "tinyint default 0")
+    private Boolean deleted;
+
+    @Column(name = "name", columnDefinition = "varchar(50) not null")
+    private String name;
+
+    @Column(name = "snake_name", columnDefinition = "varchar(50) not null")
+    private String snakeName;
+
+    @Column(name = "description", columnDefinition = "varchar(100) default ''")
+    private String description;
+
+    @Column(name = "parent_id", columnDefinition = "int default 0")
+    private Integer parentId;
+
+}
diff --git a/src/main/java/cc/ryanc/halo/model/entity/Comment.java b/src/main/java/cc/ryanc/halo/model/entity/Comment.java
new file mode 100644
index 000000000..ba69618a2
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/model/entity/Comment.java
@@ -0,0 +1,64 @@
+package cc.ryanc.halo.model.entity;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+import org.hibernate.annotations.SQLDelete;
+import org.hibernate.annotations.Where;
+
+import javax.persistence.*;
+import java.util.Date;
+
+/**
+ * Comment entity.
+ *
+ * @author johnniang
+ */
+@Entity
+@Table(name = "comments")
+@SQLDelete(sql = "update comments set deleted = true where id = ?")
+@Where(clause = "deleted = false")
+@Data
+@ToString
+@EqualsAndHashCode
+public class Comment {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Column(name = "create_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date createTime;
+
+    @Column(name = "update_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date updateTime;
+
+    @Column(name = "deleted", columnDefinition = "tinyint default 0")
+    private Boolean deleted;
+
+    @Column(name = "author", columnDefinition = "varchar(50) not null")
+    private String author;
+
+    @Column(name = "email", columnDefinition = "varchar(50) default ''")
+    private String email;
+
+    @Column(name = "ip_address", columnDefinition = "varchar(127) default ''")
+    private String ipAddress;
+
+    @Column(name = "gavatar_md5", columnDefinition = "varchar(128) default ''")
+    private String gavatarMd5;
+
+    @Column(name = "content", columnDefinition = "varchar(1024) not null")
+    private String content;
+
+    @Column(name = "user_agent", columnDefinition = "varchar(512) default ''")
+    private String userAgent;
+
+    @Column(name = "is_admin", columnDefinition = "tinyint default 0")
+    private Boolean isAdmin;
+
+    @Column(name = "parent_id", columnDefinition = "bigint default 0")
+    private Long parentId;
+}
diff --git a/src/main/java/cc/ryanc/halo/model/entity/Log.java b/src/main/java/cc/ryanc/halo/model/entity/Log.java
new file mode 100644
index 000000000..8b6037788
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/model/entity/Log.java
@@ -0,0 +1,55 @@
+package cc.ryanc.halo.model.entity;
+
+
+import cc.ryanc.halo.model.entity.enums.LogType;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+import org.hibernate.annotations.SQLDelete;
+import org.hibernate.annotations.Where;
+
+import javax.persistence.*;
+import java.util.Date;
+
+/**
+ * Log entity.
+ *
+ * @author johnniang
+ */
+@Entity
+@Table(name = "logs")
+@SQLDelete(sql = "update logs set deleted = true where id = ?")
+@Where(clause = "deleted = false")
+@Data
+@ToString
+@EqualsAndHashCode
+public class Log {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Column(name = "create_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date createTime;
+
+    @Column(name = "update_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date updateTime;
+
+    @Column(name = "deleted", columnDefinition = "tinyint default 0")
+    private Boolean deleted;
+
+    @Column(name = "log_key", columnDefinition = "varchar(1023) default ''")
+    private String logKey;
+
+    @Column(name = "type", columnDefinition = "int not null")
+    private LogType type;
+
+    @Column(name = "content", columnDefinition = "varchar(1023) not null")
+    private String content;
+
+    @Column(name = "ip_address", columnDefinition = "varchar(127) default ''")
+    private String ipAddress;
+
+}
diff --git a/src/main/java/cc/ryanc/halo/model/entity/Option.java b/src/main/java/cc/ryanc/halo/model/entity/Option.java
new file mode 100644
index 000000000..e579ce0af
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/model/entity/Option.java
@@ -0,0 +1,47 @@
+package cc.ryanc.halo.model.entity;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+import org.hibernate.annotations.SQLDelete;
+import org.hibernate.annotations.Where;
+
+import javax.persistence.*;
+import java.util.Date;
+
+/**
+ * Setting entity.
+ *
+ * @author johnniang
+ */
+@Entity
+@Table(name = "options")
+@SQLDelete(sql = "update options set deleted = true where id = ?")
+@Where(clause = "deleted = false")
+@Data
+@ToString
+@EqualsAndHashCode
+public class Option {
+
+    @Id
+    @GeneratedValue
+    private Integer id;
+
+    @Column(name = "create_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date createTime;
+
+    @Column(name = "update_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date updateTime;
+
+    @Column(name = "deleted", columnDefinition = "TINYINT default 0")
+    private Boolean deleted;
+
+    @Column(name = "option_key", columnDefinition = "varchar(100) not null")
+    private String optionKey;
+
+    @Column(name = "option_value", columnDefinition = "varchar(1023) not null")
+    private String optionValue;
+
+}
diff --git a/src/main/java/cc/ryanc/halo/model/entity/Post.java b/src/main/java/cc/ryanc/halo/model/entity/Post.java
new file mode 100644
index 000000000..300e290b5
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/model/entity/Post.java
@@ -0,0 +1,81 @@
+package cc.ryanc.halo.model.entity;
+
+import cc.ryanc.halo.model.entity.enums.PostCreateFrom;
+import cc.ryanc.halo.model.entity.enums.PostType;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+import org.hibernate.annotations.SQLDelete;
+import org.hibernate.annotations.Where;
+
+import javax.persistence.*;
+import java.util.Date;
+
+/**
+ * Post entity.
+ *
+ * @author johnniang
+ */
+@Entity
+@Table(name = "posts")
+@SQLDelete(sql = "update posts set deleted = true where id = ?")
+@Where(clause = "deleted = false")
+@Data
+@ToString
+@EqualsAndHashCode
+public class Post {
+
+    @Id
+    @GeneratedValue
+    private Integer id;
+
+    @Column(name = "create_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date createTime;
+
+    @Column(name = "update_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date updateTime;
+
+    @Column(name = "deleted", columnDefinition = "tinyint default 0")
+    private Boolean deleted;
+
+    @Column(name = "title", columnDefinition = "varchar(100) not null")
+    private String title;
+
+    @Column(name = "type", columnDefinition = "int default 0")
+    private PostType type;
+
+    @Column(name = "original_content", columnDefinition = "text not null")
+    private String originalContent;
+
+    @Column(name = "format_content", columnDefinition = "text not null")
+    private String formatContent;
+
+    @Column(name = "summary", columnDefinition = "varchar(500) default ''")
+    private String summary;
+
+    @Column(name = "thumbnail", columnDefinition = "varchar(1023) default ''")
+    private String thumbnail;
+
+    @Column(name = "visits", columnDefinition = "bigint default 0")
+    private Long visits;
+
+    @Column(name = "disallow_comment", columnDefinition = "int default 0")
+    private Boolean disallowComment;
+
+    @Column(name = "password", columnDefinition = "varchar(255) default ''")
+    private String password;
+
+    @Column(name = "template", columnDefinition = "varchar(255) default ''")
+    private String template;
+
+    @Column(name = "top_priority", columnDefinition = "int default 0")
+    private Integer topPriority;
+
+    @Column(name = "create_from", columnDefinition = "int default 0")
+    private PostCreateFrom createFrom;
+
+    @Column(name = "likes", columnDefinition = "bigint default 0")
+    private Long likes;
+}
diff --git a/src/main/java/cc/ryanc/halo/model/entity/PostCategory.java b/src/main/java/cc/ryanc/halo/model/entity/PostCategory.java
new file mode 100644
index 000000000..b4aecb27c
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/model/entity/PostCategory.java
@@ -0,0 +1,46 @@
+package cc.ryanc.halo.model.entity;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+import org.hibernate.annotations.SQLDelete;
+import org.hibernate.annotations.Where;
+
+import javax.persistence.*;
+import java.util.Date;
+
+/**
+ * Post category entity.
+ *
+ * @author johnniang
+ */
+@Entity
+@Table(name = "post_categories")
+@SQLDelete(sql = "update post_categories set deleted = true where id = ?")
+@Where(clause = "deleted = false")
+@Data
+@ToString
+@EqualsAndHashCode
+public class PostCategory {
+
+    @Id
+    @GeneratedValue
+    private Integer id;
+
+    @Column(name = "create_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date createTime;
+
+    @Column(name = "update_time", columnDefinition = "timestamp default CURRENT_TIME")
+    @Temporal(TemporalType.TIMESTAMP)
+    private Date updateTime;
+
+    @Column(name = "deleted", columnDefinition = "tinyint default 0")
+    private Boolean deleted;
+
+    @Column(name = "category_id")
+    private Integer categoryId;
+
+    @Column(name = "post_id")
+    private Integer postId;
+}
diff --git a/src/main/java/cc/ryanc/halo/model/entity/enums/CommentStatus.java b/src/main/java/cc/ryanc/halo/model/entity/enums/CommentStatus.java
new file mode 100644
index 000000000..d7da65069
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/model/entity/enums/CommentStatus.java
@@ -0,0 +1,24 @@
+package cc.ryanc.halo.model.entity.enums;
+
+/**
+ * Comment status.
+ *
+ * @author johnniang
+ */
+public enum CommentStatus implements ValueEnum<Integer> {
+
+    PUBLISHED(0),
+    AUDITING(1),
+    RECYCLE(2);
+
+    private final Integer value;
+
+    CommentStatus(Integer value) {
+        this.value = value;
+    }
+
+    @Override
+    public Integer getValue() {
+        return value;
+    }
+}
diff --git a/src/main/java/cc/ryanc/halo/model/entity/enums/LogType.java b/src/main/java/cc/ryanc/halo/model/entity/enums/LogType.java
new file mode 100644
index 000000000..e37877acd
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/model/entity/enums/LogType.java
@@ -0,0 +1,22 @@
+package cc.ryanc.halo.model.entity.enums;
+
+/**
+ * Log type.
+ *
+ * @author johnniang
+ */
+public enum LogType implements ValueEnum<Integer> {
+    ;
+
+    private final Integer value;
+
+    LogType(Integer value) {
+        this.value = value;
+    }
+
+
+    @Override
+    public Integer getValue() {
+        return value;
+    }
+}
diff --git a/src/main/java/cc/ryanc/halo/model/entity/enums/PostCreateFrom.java b/src/main/java/cc/ryanc/halo/model/entity/enums/PostCreateFrom.java
new file mode 100644
index 000000000..ed6412703
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/model/entity/enums/PostCreateFrom.java
@@ -0,0 +1,23 @@
+package cc.ryanc.halo.model.entity.enums;
+
+/**
+ * Post create from type.
+ *
+ * @author johnniang
+ */
+public enum PostCreateFrom implements ValueEnum<Integer> {
+
+    ADMIN(0),
+    WECHAT(1);
+
+    private final Integer value;
+
+    PostCreateFrom(Integer value) {
+        this.value = value;
+    }
+
+    @Override
+    public Integer getValue() {
+        return value;
+    }
+}
diff --git a/src/main/java/cc/ryanc/halo/model/entity/enums/PostType.java b/src/main/java/cc/ryanc/halo/model/entity/enums/PostType.java
new file mode 100644
index 000000000..054af7ddf
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/model/entity/enums/PostType.java
@@ -0,0 +1,24 @@
+package cc.ryanc.halo.model.entity.enums;
+
+/**
+ * Post type.
+ *
+ * @author johnniang
+ */
+public enum PostType implements ValueEnum<Integer> {
+
+    POST(0),
+    PAGE(1),
+    JOURNAL(2);
+
+    private final Integer value;
+
+    PostType(Integer value) {
+        this.value = value;
+    }
+
+    @Override
+    public Integer getValue() {
+        return value;
+    }
+}
diff --git a/src/main/java/cc/ryanc/halo/model/entity/enums/ValueEnum.java b/src/main/java/cc/ryanc/halo/model/entity/enums/ValueEnum.java
new file mode 100644
index 000000000..18917e622
--- /dev/null
+++ b/src/main/java/cc/ryanc/halo/model/entity/enums/ValueEnum.java
@@ -0,0 +1,41 @@
+package cc.ryanc.halo.model.entity.enums;
+
+import org.springframework.util.Assert;
+
+import java.util.stream.Stream;
+
+/**
+ * Interface for value enum.
+ *
+ * @param <T> value type
+ * @author johnniang
+ */
+public interface ValueEnum<T> {
+
+    /**
+     * Get enum value.
+     *
+     * @return enum value
+     */
+    T getValue();
+
+    /**
+     * Convert value to corresponding enum.
+     *
+     * @param enumType enum type
+     * @param value    database value
+     * @param <V>      value generic
+     * @param <E>      enum generic
+     * @return corresponding enum
+     */
+    static <V, E extends ValueEnum<V>> E valueToEnum(Class<E> enumType, V value) {
+        Assert.notNull(enumType, "enum type must not be null");
+        Assert.notNull(value, "value must not be null");
+        Assert.isTrue(enumType.isEnum(), "type must be an enum type");
+
+        return Stream.of(enumType.getEnumConstants())
+                .filter(item -> item.getValue().equals(value))
+                .findFirst()
+                .orElseThrow(() -> new IllegalArgumentException("unknown database value: " + value));
+    }
+}