Question

我正在使用ODAC将带有SQL Server的proyect迁移到Oracle。 NET 4.0和实体框架6。我可以访问这个基础并创建表但是当EF尝试读取这个表时我有这个例外：错误：ORA-00942。我在DB中检查这些表，它存在，但是如果我试着用这个查找内容（select * from table）我有一个错误“表不存在”但如果我尝试使用双引号我可以（{{1} }）。

我在实体中放了一些代码来选择我的模式，因为没有这个我有其他例外：

select * from "table"

这是我的DbMigration代码：

 public class ChatEntities : DbContext
    {
        public ChatEntities(): base ("ChatContext")
        {
        }      
        public DbSet<ChatUser> ChatUser { get; set; }
        public DbSet<Chat> Chat { get; set; }
        public DbSet<ChatPeople> ChatPeople { get; set; }
        public DbSet<ChatHistory> ChatHistory { get; set; }      

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {           
            modelBuilder.HasDefaultSchema("PROYECT");         
            modelBuilder.Entity<ChatUser>().ToTable("ChatUser", schemaName: "PROYECT");
            modelBuilder.Entity<Chat>().ToTable("Chat", schemaName: "PROYECT");
            modelBuilder.Entity<ChatPeople>().ToTable("ChatPeople", schemaName: "PROYECT");
            modelBuilder.Entity<ChatHistory>().ToTable("ChatHistory", schemaName: "PROYECT");    
        }
    }

.........

在每个班级中我都放了这个数据注释

  string  schema = "PROYECT.";
        public override void Up()
        {
            CreateTable(
                schema + "Chats",
                c => new
                    {
                        Id = c.Decimal(nullable: false, precision: 10, scale: 0, identity: true),
                        AdminId = c.Decimal(nullable: false, precision: 10, scale: 0),
                    })
                .PrimaryKey(t => t.Id);

            CreateTable(
                schema + "ChatHistories",
                c => new
                    {
                        Id = c.Decimal(nullable: false, precision: 10, scale: 0, identity: true),
                        ChatId = c.Decimal(nullable: false, precision: 10, scale: 0),
                        UserId = c.Decimal(nullable: false, precision: 10, scale: 0),
                        Message = c.String(),
                        Date = c.DateTime(nullable: false),
                    })
                .PrimaryKey(t => t.Id)
                .ForeignKey(schema + "Chats", t => t.ChatId, cascadeDelete: true)
                .Index(t => t.ChatId);

我在其他帖子中读到我需要将Schema放在UpperCase中并且我有这个但是EF用双引号创建所有表并且在找不到这个表之后。

任何想法或解决方案，谢谢。

Answer 1

默认情况下，Oracle以大写形式存储表和其他对象名称。可以通过将对象名称括在双引号"中来覆盖它。由于您可以通过用双引号括起它来访问表，这意味着表是使用混合大小写名称创建的。

您需要用双引号括住任何对象名称，以便在除了全部大写以外的任何情况下存储它们时访问它们。

如果您更改迁移代码以将表格名称存储为大写，那么您将不再需要双引号来访问您的表格。

Answer 2

ORACLE中的案例和使用引号引起的混乱很容易使您失望。说到ORACLE，只需使用所有大写字母。此示例是使用Oracle.ManagedDataAccess.EntityFramework NuGet包与Oracle的.NET框架身份集成。所有CAPS up脚本：

------------------------------------------------------------- */
-- Add sequences                                                          */
-- ---------------------------------------------------------------------- */

CREATE SEQUENCE SQ_ASPNETUSERCLAIMS
    START WITH 1
    INCREMENT BY 1
    MINVALUE 1
    NOMAXVALUE
    nocycle
    noorder
/

-- ---------------------------------------------------------------------- */
-- Add tables                                                             */
-- ---------------------------------------------------------------------- */

-- ---------------------------------------------------------------------- */
-- Add table "ASPNETUSERS"                                                */
-- ---------------------------------------------------------------------- */

CREATE TABLE ASPNETUSERS (
    ID NVARCHAR2(128) CONSTRAINT NN_ANU_ID NOT NULL,
    EMAIL NVARCHAR2(256),
    EMAILCONFIRMED NUMBER(1) CONSTRAINT NN_ANU_EMAILCONFIRMED NOT NULL,
    PASSWORDHASH NCLOB,
    SECURITYSTAMP NCLOB,
    PHONENUMBER NCLOB,
    PHONENUMBERCONFIRMED NUMBER(1) CONSTRAINT NN_ANU_PHONENUMBERCONFIRMED NOT NULL,
    TWOFACTORENABLED NUMBER(1) CONSTRAINT NN_ANU_TWOFACTORENABLED NOT NULL,
    LOCKOUTENDDATEUTC DATE,
    LOCKOUTENABLED NUMBER(1) CONSTRAINT NN_ANU_LOCKOUTENABLED NOT NULL,
    ACCESSFAILEDCOUNT NUMBER(10) CONSTRAINT NN_ANU_ACCESSFAILEDCOUNT NOT NULL,
    USERNAME NVARCHAR2(256) CONSTRAINT NN_ANU_USERNAME NOT NULL,
    CONSTRAINT PK_ASPNETUSERS PRIMARY KEY (ID)
)
/

-- ---------------------------------------------------------------------- */
-- Add table "ASPNETROLES"                                                */
-- ---------------------------------------------------------------------- */

CREATE TABLE ASPNETROLES (
    ID NVARCHAR2(128) CONSTRAINT NN_ANR_ID NOT NULL,
    NAME NVARCHAR2(256) CONSTRAINT NN_ANR_NAME NOT NULL,
    CONSTRAINT PK_ASPNETROLES PRIMARY KEY (ID)
)
/

-- ---------------------------------------------------------------------- */
-- Add table "ASPNETUSERROLES"                                            */
-- ---------------------------------------------------------------------- */

CREATE TABLE ASPNETUSERROLES (
    USERID NVARCHAR2(128) CONSTRAINT NN_ANUR_USERID NOT NULL,
    ROLEID NVARCHAR2(128) CONSTRAINT NN_ANUR_ROLEID NOT NULL,
    CONSTRAINT PK_ASPNETUSERROLES PRIMARY KEY (USERID, ROLEID)
)
/

-- ---------------------------------------------------------------------- */
-- Add table "ASPNETUSERLOGINS"                                           */
-- ---------------------------------------------------------------------- */

CREATE TABLE ASPNETUSERLOGINS (
    LOGINPROVIDER NVARCHAR2(128) CONSTRAINT NN_ANUL_LOGINPROVIDER NOT NULL,
    PROVIDERKEY NVARCHAR2(128) CONSTRAINT NN_ANUL_PROVIDERKEY NOT NULL,
    USERID NVARCHAR2(128) CONSTRAINT NN_ANUL_USERID NOT NULL,
    CONSTRAINT PK_ASPNETUSERLOGINS PRIMARY KEY (LOGINPROVIDER, PROVIDERKEY, USERID)
)
/

-- ---------------------------------------------------------------------- */
-- Add table "ASPNETUSERCLAIMS"                                           */
-- ---------------------------------------------------------------------- */

CREATE TABLE ASPNETUSERCLAIMS (
    ID NUMBER(10) CONSTRAINT NN_ANUC_ID NOT NULL,
    USERID NVARCHAR2(128) CONSTRAINT NN_ANUC_USERID NOT NULL,
    CLAIMTYPE NCLOB,
    CLAIMVALUE NCLOB,
    CONSTRAINT PK_ASPNETUSERCLAIMS PRIMARY KEY (ID)
)
/

-- ---------------------------------------------------------------------- */
-- Add foreign key constraints                                            */
-- ---------------------------------------------------------------------- */

ALTER TABLE ASPNETUSERLOGINS ADD CONSTRAINT FK_ASPNETUSERLOGINS_USERID 
    FOREIGN KEY (USERID) REFERENCES ASPNETUSERS (ID) ON DELETE CASCADE
/

ALTER TABLE ASPNETUSERCLAIMS ADD CONSTRAINT FK_ASPNETUSERCLAIMS_USERID 
    FOREIGN KEY (USERID) REFERENCES ASPNETUSERS (ID) ON DELETE CASCADE
/

ALTER TABLE ASPNETUSERROLES ADD CONSTRAINT FK_ASPNETUSERROLES_USERID 
    FOREIGN KEY (USERID) REFERENCES ASPNETUSERS (ID) ON DELETE CASCADE
/

ALTER TABLE ASPNETUSERROLES ADD CONSTRAINT FK_ASPNETUSERROLES_ROLEID 
    FOREIGN KEY (ROLEID) REFERENCES ASPNETROLES (ID) ON DELETE CASCADE
/

-- ---------------------------------------------------------------------- */
-- Add triggers                                                           */
-- ---------------------------------------------------------------------- */

CREATE OR REPLACE TRIGGER TR_ASPNETUSERCLAIMS       
BEFORE INSERT ON ASPNETUSERCLAIMS
FOR EACH ROW
BEGIN
    SELECT SQ_ASPNETUSERCLAIMS.nextval INTO :new.ID FROM dual;
END;
/

IdentityModel.cs中的代码以映射到所有大写字母

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    base.OnModelCreating(modelBuilder);

    // user id of owner
    var ownerSchema = System.Configuration.ConfigurationManager.AppSettings["OwnerSchema"];
    modelBuilder.HasDefaultSchema(ownerSchema);

    // the identity framework is looking for table and column names that are camel cased
    // however, our scripts don't force camel casing (we don't put quotes around our table and column names in the deltas)
    // therefore, we need to tell the identity framework to look for the all CAPS versions of the tables and columns

    modelBuilder.Entity<IdentityRole>().ToTable("ASPNETROLES", adminSchema);
    modelBuilder.Entity<IdentityRole>().Property(p => p.Id).HasColumnName("ID");
    modelBuilder.Entity<IdentityRole>().Property(p => p.Name).HasColumnName("NAME");

    modelBuilder.Entity<IdentityUserClaim>().ToTable("ASPNETUSERCLAIMS");
    modelBuilder.Entity<IdentityUserClaim>().Property(p => p.Id).HasColumnName("ID");
    modelBuilder.Entity<IdentityUserClaim>().Property(p => p.UserId).HasColumnName("USERID");
    modelBuilder.Entity<IdentityUserClaim>().Property(p => p.ClaimType).HasColumnName("CLAIMTYPE");
    modelBuilder.Entity<IdentityUserClaim>().Property(p => p.ClaimValue).HasColumnName("CLAIMVALUE");

    modelBuilder.Entity<IdentityUserLogin>().ToTable("ASPNETUSERLOGINS");
    modelBuilder.Entity<IdentityUserLogin>().Property(p => p.LoginProvider).HasColumnName("LOGINPROVIDER");
    modelBuilder.Entity<IdentityUserLogin>().Property(p => p.ProviderKey).HasColumnName("PROVIDERKEY");
    modelBuilder.Entity<IdentityUserLogin>().Property(p => p.UserId).HasColumnName("USERID");

    modelBuilder.Entity<IdentityUserRole>().ToTable("ASPNETUSERROLES");
    modelBuilder.Entity<IdentityUserRole>().Property(p => p.UserId).HasColumnName("USERID");
    modelBuilder.Entity<IdentityUserRole>().Property(p => p.RoleId).HasColumnName("ROLEID");

    modelBuilder.Entity<ApplicationUser>().ToTable("ASPNETUSERS");
    modelBuilder.Entity<ApplicationUser>().Property(p => p.UserName).HasColumnName("USERNAME");
    modelBuilder.Entity<ApplicationUser>().Property(p => p.TwoFactorEnabled).HasColumnName("TWOFACTORENABLED");
    modelBuilder.Entity<ApplicationUser>().Property(p => p.SecurityStamp).HasColumnName("SECURITYSTAMP");
    modelBuilder.Entity<ApplicationUser>().Property(p => p.PhoneNumberConfirmed).HasColumnName("PHONENUMBERCONFIRMED");
    modelBuilder.Entity<ApplicationUser>().Property(p => p.PhoneNumber).HasColumnName("PHONENUMBER");
    modelBuilder.Entity<ApplicationUser>().Property(P => P.PasswordHash).HasColumnName("PASSWORDHASH");
    modelBuilder.Entity<ApplicationUser>().Property(p => p.LockoutEndDateUtc).HasColumnName("LOCKOUTENDDATEUTC");
    modelBuilder.Entity<ApplicationUser>().Property(p => p.LockoutEnabled).HasColumnName("LOCKOUTENABLED");
    modelBuilder.Entity<ApplicationUser>().Property(p => p.Id).HasColumnName("ID");
    modelBuilder.Entity<ApplicationUser>().Property(p => p.EmailConfirmed).HasColumnName("EMAILCONFIRMED");
    modelBuilder.Entity<ApplicationUser>().Property(p => p.Email).HasColumnName("EMAIL");
    modelBuilder.Entity<ApplicationUser>().Property(p => p.AccessFailedCount).HasColumnName("ACCESSFAILEDCOUNT");

}

如果您有兴趣，请删除脚本以回滚：

-- ---------------------------------------------------------------------- */
-- Drop triggers                                                          */
-- ---------------------------------------------------------------------- */

DROP TRIGGER TR_ASPNETUSERCLAIMS;

-- ---------------------------------------------------------------------- */
-- Drop foreign key constraints                                           */
-- ---------------------------------------------------------------------- */

ALTER TABLE ASPNETUSERLOGINS DROP CONSTRAINT FK_ASPNETUSERLOGINS_USERID
/

ALTER TABLE ASPNETUSERCLAIMS DROP CONSTRAINT FK_ASPNETUSERCLAIMS_USERID
/

ALTER TABLE ASPNETUSERROLES DROP CONSTRAINT FK_ASPNETUSERROLES_USERID
/

ALTER TABLE ASPNETUSERROLES DROP CONSTRAINT FK_ASPNETUSERROLES_ROLEID
/

-- ---------------------------------------------------------------------- */
-- Drop table "ASPNETUSERCLAIMS"                                          */
-- ---------------------------------------------------------------------- */

-- Drop constraints */

ALTER TABLE ASPNETUSERCLAIMS DROP CONSTRAINT NN_ANUC_ID
/

ALTER TABLE ASPNETUSERCLAIMS DROP CONSTRAINT NN_ANUC_USERID
/

ALTER TABLE ASPNETUSERCLAIMS DROP CONSTRAINT PK_ASPNETUSERCLAIMS
/

DROP TABLE ASPNETUSERCLAIMS
/

-- ---------------------------------------------------------------------- */
-- Drop table "ASPNETUSERLOGINS"                                          */
-- ---------------------------------------------------------------------- */

-- Drop constraints */

ALTER TABLE ASPNETUSERLOGINS DROP CONSTRAINT NN_ANUL_LOGINPROVIDER
/

ALTER TABLE ASPNETUSERLOGINS DROP CONSTRAINT NN_ANUL_PROVIDERKEY
/

ALTER TABLE ASPNETUSERLOGINS DROP CONSTRAINT NN_ANUL_USERID
/

ALTER TABLE ASPNETUSERLOGINS DROP CONSTRAINT PK_ASPNETUSERLOGINS
/

DROP TABLE ASPNETUSERLOGINS
/

-- ---------------------------------------------------------------------- */
-- Drop table "ASPNETUSERROLES"                                           */
-- ---------------------------------------------------------------------- */

-- Drop constraints */

ALTER TABLE ASPNETUSERROLES DROP CONSTRAINT NN_ANUR_USERID
/

ALTER TABLE ASPNETUSERROLES DROP CONSTRAINT NN_ANUR_ROLEID
/

ALTER TABLE ASPNETUSERROLES DROP CONSTRAINT PK_ASPNETUSERROLES
/

DROP TABLE ASPNETUSERROLES
/

-- ---------------------------------------------------------------------- */
-- Drop table "ASPNETROLES"                                               */
-- ---------------------------------------------------------------------- */

-- Drop constraints */

ALTER TABLE ASPNETROLES DROP CONSTRAINT NN_ANR_ID
/

ALTER TABLE ASPNETROLES DROP CONSTRAINT NN_ANR_NAME
/

ALTER TABLE ASPNETROLES DROP CONSTRAINT PK_ASPNETROLES
/

DROP TABLE ASPNETROLES
/

-- ---------------------------------------------------------------------- */
-- Drop table "ASPNETUSERS"                                               */
-- ---------------------------------------------------------------------- */

-- Drop constraints */

ALTER TABLE ASPNETUSERS DROP CONSTRAINT NN_ANU_ID
/

ALTER TABLE ASPNETUSERS DROP CONSTRAINT NN_ANU_EMAILCONFIRMED
/

ALTER TABLE ASPNETUSERS DROP CONSTRAINT NN_ANU_PHONENUMBERCONFIRMED
/

ALTER TABLE ASPNETUSERS DROP CONSTRAINT NN_ANU_TWOFACTORENABLED
/

ALTER TABLE ASPNETUSERS DROP CONSTRAINT NN_ANU_LOCKOUTENABLED
/

ALTER TABLE ASPNETUSERS DROP CONSTRAINT NN_ANU_ACCESSFAILEDCOUNT
/

ALTER TABLE ASPNETUSERS DROP CONSTRAINT NN_ANU_USERNAME
/

ALTER TABLE ASPNETUSERS DROP CONSTRAINT PK_ASPNETUSERS
/

DROP TABLE ASPNETUSERS
/

-- ---------------------------------------------------------------------- */
-- Drop sequences                                                         */
-- ---------------------------------------------------------------------- */

DROP SEQUENCE SQ_ASPNETUSERCLAIMS
/

带双引号的EFcreate表ODAC错误：ORA-00942

2 个答案: