/// <summary>
/// 获取多对多的映射关系
/// </summary>
/// <param name="entityContext"></param>
/// <param name="joinTable"></param>
private void CreateManyToMany(EntityContext entityContext, TableSchema joinTable)
{
if (joinTable.ForeignKeys.Count != 2)
{
return;
}
var joinTableName = joinTable.Name;
var joinSchemaName = joinTable.Owner;
// first fkey is always left, second fkey is right
var leftForeignKey = joinTable.ForeignKeys[0];
var leftTable = leftForeignKey.PrimaryKeyTable;
var joinLeftColumn = leftForeignKey.ForeignKeyMemberColumns.Select(c => c.Name).ToList();
var leftEntity = GetEntity(entityContext, leftTable, false, false);
var rightForeignKey = joinTable.ForeignKeys[1];
var rightTable = rightForeignKey.PrimaryKeyTable;
var joinRightColumn = rightForeignKey.ForeignKeyMemberColumns.Select(c => c.Name).ToList();
var rightEntity = GetEntity(entityContext, rightTable, false, false);
string leftPropertyName = Settings.RelationshipName(rightEntity.ClassName);
leftPropertyName = _namer.UniqueName(leftEntity.ClassName, leftPropertyName);
string rightPropertyName = Settings.RelationshipName(leftEntity.ClassName);
rightPropertyName = _namer.UniqueName(rightEntity.ClassName, rightPropertyName);
string relationshipName = string.Format("{0}|{1}",
leftForeignKey.Name,
rightForeignKey.Name);
relationshipName = _namer.UniqueRelationshipName(relationshipName);
var left = new Relationship
{
RelationshipName = relationshipName,
IsForeignKey = false,
IsMapped = true,
ThisCardinality = Cardinality.Many,
ThisEntity = leftEntity.ClassName,
ThisPropertyName = leftPropertyName,
OtherCardinality = Cardinality.Many,
OtherEntity = rightEntity.ClassName,
OtherPropertyName = rightPropertyName,
JoinTable = joinTableName,
JoinSchema = joinSchemaName,
JoinThisColumn = new List <string>(joinLeftColumn),
JoinOtherColumn = new List <string>(joinRightColumn)
};
leftEntity.Relationships.Add(left);
var right = new Relationship
{
RelationshipName = relationshipName,
IsForeignKey = false,
IsMapped = false,
ThisCardinality = Cardinality.Many,
ThisEntity = rightEntity.ClassName,
ThisPropertyName = rightPropertyName,
OtherCardinality = Cardinality.Many,
OtherEntity = leftEntity.ClassName,
OtherPropertyName = leftPropertyName,
JoinTable = joinTableName,
JoinSchema = joinSchemaName,
JoinThisColumn = new List <string>(joinRightColumn),
JoinOtherColumn = new List <string>(joinLeftColumn)
};
rightEntity.Relationships.Add(right);
}
/// <summary>
/// 创建数据库关系对应EF的Mapper
/// </summary>
/// <param name="entityContext">数据库上下文</param>
/// <param name="foreignEntity">外键表对应实体</param>
/// <param name="tableKeySchema">主键表</param>
private void CreateRelationship(EntityContext entityContext, Entity foreignEntity, TableKeySchema tableKeySchema)
{
//获取主键表对应实体
Entity primaryEntity = GetEntity(entityContext, tableKeySchema.PrimaryKeyTable, false, false);
//主表类名
string primaryName = primaryEntity.ClassName;
//外键表名
string foreignName = foreignEntity.ClassName;
//映射名称
string relationshipName = tableKeySchema.Name;
//获取唯一映射名称
relationshipName = _namer.UniqueRelationshipName(relationshipName);
//判断是否级联删除
bool isCascadeDelete = IsCascadeDelete(tableKeySchema);
bool foreignMembersRequired;
bool primaryMembersRequired;
//获取外键表所有键属性名称
List <string> foreignMembers = GetKeyMembers(foreignEntity, tableKeySchema.ForeignKeyMemberColumns, tableKeySchema.Name, out foreignMembersRequired);
//获取主表中所有键的成员属性名称
List <string> primaryMembers = GetKeyMembers(primaryEntity, tableKeySchema.PrimaryKeyMemberColumns, tableKeySchema.Name, out primaryMembersRequired);
// 过滤没有外键主键的表处理
if (foreignMembers == null || primaryMembers == null)
{
return;
}
Relationship foreignRelationship = foreignEntity.Relationships
.FirstOrDefault(r => r.RelationshipName == relationshipName && r.IsForeignKey);
if (foreignRelationship == null)
{
foreignRelationship = new Relationship {
RelationshipName = relationshipName
};
foreignEntity.Relationships.Add(foreignRelationship);
}
foreignRelationship.IsMapped = true;
foreignRelationship.IsForeignKey = true;
foreignRelationship.ThisCardinality = foreignMembersRequired ? Cardinality.One : Cardinality.ZeroOrOne;
foreignRelationship.ThisEntity = foreignName;
foreignRelationship.ThisProperties = new List <string>(foreignMembers);
foreignRelationship.OtherEntity = primaryName;
foreignRelationship.OtherProperties = new List <string>(primaryMembers);
foreignRelationship.CascadeDelete = isCascadeDelete;
string prefix = GetMemberPrefix(foreignRelationship, primaryName, foreignName);
string foreignPropertyName = ToPropertyName(foreignEntity.ClassName, prefix + primaryName);
foreignPropertyName = _namer.UniqueName(foreignEntity.ClassName, foreignPropertyName);
foreignRelationship.ThisPropertyName = foreignPropertyName;
// add reverse
Relationship primaryRelationship = primaryEntity.Relationships
.FirstOrDefault(r => r.RelationshipName == relationshipName && r.IsForeignKey == false);
if (primaryRelationship == null)
{
primaryRelationship = new Relationship {
RelationshipName = relationshipName
};
primaryEntity.Relationships.Add(primaryRelationship);
}
primaryRelationship.IsMapped = false;
primaryRelationship.IsForeignKey = false;
primaryRelationship.ThisEntity = primaryName;
primaryRelationship.ThisProperties = new List <string>(primaryMembers);
primaryRelationship.OtherEntity = foreignName;
primaryRelationship.OtherProperties = new List <string>(foreignMembers);
primaryRelationship.CascadeDelete = isCascadeDelete;
bool isOneToOne = IsOneToOne(tableKeySchema, foreignRelationship);
if (isOneToOne)
{
primaryRelationship.ThisCardinality = primaryMembersRequired ? Cardinality.One : Cardinality.ZeroOrOne;
}
else
{
primaryRelationship.ThisCardinality = Cardinality.Many;
}
string primaryPropertyName = prefix + foreignName;
if (!isOneToOne)
{
primaryPropertyName = Settings.RelationshipName(primaryPropertyName);
}
primaryPropertyName = ToPropertyName(primaryEntity.ClassName, primaryPropertyName);
primaryPropertyName = _namer.UniqueName(primaryEntity.ClassName, primaryPropertyName);
primaryRelationship.ThisPropertyName = primaryPropertyName;
foreignRelationship.OtherPropertyName = primaryRelationship.ThisPropertyName;
foreignRelationship.OtherCardinality = primaryRelationship.ThisCardinality;
primaryRelationship.OtherPropertyName = foreignRelationship.ThisPropertyName;
primaryRelationship.OtherCardinality = foreignRelationship.ThisCardinality;
foreignRelationship.IsProcessed = true;
primaryRelationship.IsProcessed = true;
}
/// <summary>
/// 创建数据库关系对应EF的Mapper
/// </summary>
/// <param name="entityContext">数据库上下文</param>
/// <param name="foreignEntity">外键表对应实体</param>
/// <param name="tableKeySchema">主键表</param>
private void CreateRelationship(EntityContext entityContext, Entity foreignEntity, TableKeySchema tableKeySchema)
{
//获取主键表对应实体
Entity primaryEntity = GetEntity(entityContext, tableKeySchema.PrimaryKeyTable, false, false);
//主表类名
string primaryName = primaryEntity.ClassName;
//外键表名
string foreignName = foreignEntity.ClassName;
//映射名称
string relationshipName = tableKeySchema.Name;
//获取唯一映射名称
relationshipName = _namer.UniqueRelationshipName(relationshipName);
//判断是否级联删除
bool isCascadeDelete = IsCascadeDelete(tableKeySchema);
bool foreignMembersRequired;
bool primaryMembersRequired;
//获取外键表所有键属性名称
List<string> foreignMembers = GetKeyMembers(foreignEntity, tableKeySchema.ForeignKeyMemberColumns, tableKeySchema.Name, out foreignMembersRequired);
//获取主表中所有键的成员属性名称
List<string> primaryMembers = GetKeyMembers(primaryEntity, tableKeySchema.PrimaryKeyMemberColumns, tableKeySchema.Name, out primaryMembersRequired);
// 过滤没有外键主键的表处理
if (foreignMembers == null || primaryMembers == null)
return;
Relationship foreignRelationship = foreignEntity.Relationships
.FirstOrDefault(r => r.RelationshipName == relationshipName && r.IsForeignKey);
if (foreignRelationship == null)
{
foreignRelationship = new Relationship { RelationshipName = relationshipName };
foreignEntity.Relationships.Add(foreignRelationship);
}
foreignRelationship.IsMapped = true;
foreignRelationship.IsForeignKey = true;
foreignRelationship.ThisCardinality = foreignMembersRequired ? Cardinality.One : Cardinality.ZeroOrOne;
foreignRelationship.ThisEntity = foreignName;
foreignRelationship.ThisProperties = new List<string>(foreignMembers);
foreignRelationship.OtherEntity = primaryName;
foreignRelationship.OtherProperties = new List<string>(primaryMembers);
foreignRelationship.CascadeDelete = isCascadeDelete;
string prefix = GetMemberPrefix(foreignRelationship, primaryName, foreignName);
string foreignPropertyName = ToPropertyName(foreignEntity.ClassName, prefix + primaryName);
foreignPropertyName = _namer.UniqueName(foreignEntity.ClassName, foreignPropertyName);
foreignRelationship.ThisPropertyName = foreignPropertyName;
// add reverse
Relationship primaryRelationship = primaryEntity.Relationships
.FirstOrDefault(r => r.RelationshipName == relationshipName && r.IsForeignKey == false);
if (primaryRelationship == null)
{
primaryRelationship = new Relationship { RelationshipName = relationshipName };
primaryEntity.Relationships.Add(primaryRelationship);
}
primaryRelationship.IsMapped = false;
primaryRelationship.IsForeignKey = false;
primaryRelationship.ThisEntity = primaryName;
primaryRelationship.ThisProperties = new List<string>(primaryMembers);
primaryRelationship.OtherEntity = foreignName;
primaryRelationship.OtherProperties = new List<string>(foreignMembers);
primaryRelationship.CascadeDelete = isCascadeDelete;
bool isOneToOne = IsOneToOne(tableKeySchema, foreignRelationship);
if (isOneToOne)
primaryRelationship.ThisCardinality = primaryMembersRequired ? Cardinality.One : Cardinality.ZeroOrOne;
else
primaryRelationship.ThisCardinality = Cardinality.Many;
string primaryPropertyName = prefix + foreignName;
if (!isOneToOne)
primaryPropertyName = Settings.RelationshipName(primaryPropertyName);
primaryPropertyName = ToPropertyName(primaryEntity.ClassName, primaryPropertyName);
primaryPropertyName = _namer.UniqueName(primaryEntity.ClassName, primaryPropertyName);
primaryRelationship.ThisPropertyName = primaryPropertyName;
foreignRelationship.OtherPropertyName = primaryRelationship.ThisPropertyName;
foreignRelationship.OtherCardinality = primaryRelationship.ThisCardinality;
primaryRelationship.OtherPropertyName = foreignRelationship.ThisPropertyName;
primaryRelationship.OtherCardinality = foreignRelationship.ThisCardinality;
foreignRelationship.IsProcessed = true;
primaryRelationship.IsProcessed = true;
}
/// <summary>
/// 获取多对多的映射关系
/// </summary>
/// <param name="entityContext"></param>
/// <param name="joinTable"></param>
private void CreateManyToMany(EntityContext entityContext, TableSchema joinTable)
{
if (joinTable.ForeignKeys.Count != 2)
return;
var joinTableName = joinTable.Name;
var joinSchemaName = joinTable.Owner;
// first fkey is always left, second fkey is right
var leftForeignKey = joinTable.ForeignKeys[0];
var leftTable = leftForeignKey.PrimaryKeyTable;
var joinLeftColumn = leftForeignKey.ForeignKeyMemberColumns.Select(c => c.Name).ToList();
var leftEntity = GetEntity(entityContext, leftTable, false, false);
var rightForeignKey = joinTable.ForeignKeys[1];
var rightTable = rightForeignKey.PrimaryKeyTable;
var joinRightColumn = rightForeignKey.ForeignKeyMemberColumns.Select(c => c.Name).ToList();
var rightEntity = GetEntity(entityContext, rightTable, false, false);
string leftPropertyName = Settings.RelationshipName(rightEntity.ClassName);
leftPropertyName = _namer.UniqueName(leftEntity.ClassName, leftPropertyName);
string rightPropertyName = Settings.RelationshipName(leftEntity.ClassName);
rightPropertyName = _namer.UniqueName(rightEntity.ClassName, rightPropertyName);
string relationshipName = string.Format("{0}|{1}",
leftForeignKey.Name,
rightForeignKey.Name);
relationshipName = _namer.UniqueRelationshipName(relationshipName);
var left = new Relationship
{
RelationshipName = relationshipName,
IsForeignKey = false,
IsMapped = true,
ThisCardinality = Cardinality.Many,
ThisEntity = leftEntity.ClassName,
ThisPropertyName = leftPropertyName,
OtherCardinality = Cardinality.Many,
OtherEntity = rightEntity.ClassName,
OtherPropertyName = rightPropertyName,
JoinTable = joinTableName,
JoinSchema = joinSchemaName,
JoinThisColumn = new List<string>(joinLeftColumn),
JoinOtherColumn = new List<string>(joinRightColumn)
};
leftEntity.Relationships.Add(left);
var right = new Relationship
{
RelationshipName = relationshipName,
IsForeignKey = false,
IsMapped = false,
ThisCardinality = Cardinality.Many,
ThisEntity = rightEntity.ClassName,
ThisPropertyName = rightPropertyName,
OtherCardinality = Cardinality.Many,
OtherEntity = leftEntity.ClassName,
OtherPropertyName = leftPropertyName,
JoinTable = joinTableName,
JoinSchema = joinSchemaName,
JoinThisColumn = new List<string>(joinRightColumn),
JoinOtherColumn = new List<string>(joinLeftColumn)
};
rightEntity.Relationships.Add(right);
}
/// <summary>
/// 判断一对一的关系
/// </summary>
/// <param name="tableKeySchema"></param>
/// <param name="foreignRelationship"></param>
/// <returns></returns>
private static bool IsOneToOne(TableKeySchema tableKeySchema, Relationship foreignRelationship)
{
bool isFkeyPkey = tableKeySchema.ForeignKeyTable.HasPrimaryKey
&& tableKeySchema.ForeignKeyTable.PrimaryKey != null
&& tableKeySchema.ForeignKeyTable.PrimaryKey.MemberColumns.Count == 1
&& tableKeySchema.ForeignKeyTable.PrimaryKey.MemberColumns.Contains(
foreignRelationship.ThisProperties.FirstOrDefault());
if (isFkeyPkey)
return true;
return false;
// if f.key is unique
//return tableKeySchema.ForeignKeyMemberColumns.All(column => column.IsUnique);
}
private static string GetMemberPrefix(Relationship relationship, string primaryClass, string foreignClass)
{
string thisKey = relationship.ThisProperties.FirstOrDefault() ?? string.Empty;
string otherKey = relationship.OtherProperties.FirstOrDefault() ?? string.Empty;
bool isSameName = thisKey.Equals(otherKey, StringComparison.OrdinalIgnoreCase);
isSameName = (isSameName || thisKey.Equals(primaryClass + otherKey, StringComparison.OrdinalIgnoreCase));
string prefix = string.Empty;
if (isSameName)
return prefix;
prefix = thisKey.Replace(otherKey, "");
prefix = prefix.Replace(primaryClass, "");
prefix = prefix.Replace(foreignClass, "");
prefix = Regex.Replace(prefix, @"(_ID|_id|_Id|\.ID|\.id|\.Id|ID|Id)$", "");
prefix = Regex.Replace(prefix, @"^\d", "");
return prefix;
}
