code first: bool type mapping problem

code first: bool type mapping problem

Postby christian_bertram » Mon 21 Dec 2015 09:35

I have a problem with the type mapping during a "code first" database creation

All my bool (Boolean) type attributes are mapped to a Number(22) type (also all int fields).

According to this list Boolean ist mapped to NUMBER(1), but not in my case.

https://www.devart.com/dotconnect/oracle/docs/DataTypeMapping.html

Am i missing something ? Is this the wrong type mapping table i´m refering to ?
As far as i understand it there is also no way to change the type mapping for "code first" ?
christian_bertram
 
Posts: 16
Joined: Mon 22 Jun 2015 08:38

Re: code first: bool type mapping problem

Postby Shalex » Mon 21 Dec 2015 18:04

Please try the following code in the newly created console application with the newest (8.5.558) build of dotConnect for Oracle:

App.config
Code: Select all
<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <entityFramework>
    <providers>
      <provider invariantName="Devart.Data.Oracle" type="Devart.Data.Oracle.Entity.OracleEntityProviderServices, Devart.Data.Oracle.Entity, Version=8.5.558.6, Culture=neutral, PublicKeyToken=09af7300eec23701" />
    </providers>
  </entityFramework>
  <system.data>
    <DbProviderFactories>
      <remove invariant="Devart.Data.Oracle" />
      <add name="dotConnect for Oracle" invariant="Devart.Data.Oracle" description="Devart dotConnect for Oracle" type="Devart.Data.Oracle.OracleProviderFactory, Devart.Data.Oracle, Version=8.5.558.0, Culture=neutral, PublicKeyToken=09af7300eec23701" />
    </DbProviderFactories>
  </system.data>
  <connectionStrings>
    <add name="MyDbContext" connectionString="server=orcl1120;uid=scott;pwd=tiger;" providerName="Devart.Data.Oracle"/>
  </connectionStrings>
</configuration>


Program.cs
Code: Select all
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication {
    class Program {
        static void Main(string[] args) {

            var monitor = new Devart.Data.Oracle.OracleMonitor() { IsActive = true };

            using (var context = new MyDbContext()) {

                context.Database.Initialize(true);
            }
        }
    }

    public class MyDbContext : DbContext {

        public DbSet<C1> C1s { get; set; }
    }

    [System.ComponentModel.DataAnnotations.Schema.Table("C1")]
    public class C1 {
        [System.ComponentModel.DataAnnotations.Key]
        public int Id { get; set; }
        public bool BoolProperty { get; set; }
    }
}


The dbMonitor tool shows the following SQL statements sent to the server:
Code: Select all
CREATE TABLE C1 (
  "Id" NUMBER(10) NOT NULL,
  "BoolProperty" NUMBER(1) NOT NULL,
  CONSTRAINT PK_C1 PRIMARY KEY ("Id")
)
/
CREATE SEQUENCE C1_SEQ
/
CREATE OR REPLACE TRIGGER C1_INS_TRG
  BEFORE INSERT ON C1
  FOR EACH ROW
BEGIN
  SELECT C1_SEQ.NEXTVAL INTO :NEW."Id" FROM DUAL;
END;

Please tell us how we should modify the code to reproduce the issue.
Shalex
Devart Team
 
Posts: 7616
Joined: Thu 14 Aug 2008 12:44

Re: code first: bool type mapping problem

Postby christian_bertram » Wed 30 Dec 2015 09:45

Ok, thanks for your investigation. I found the reason. The devart provider is not the problem.

Actually oracle tricked me. The wrong type is only shown in my sql select of the database structure.
Code: Select all
   select COLUMN_NAME, DATA_TYPE, DATA_LENGTH, DATA_PRECISION from user_tab_columns order by DATA_TYPE;


I looked for the data_length attribute but number types length is shown in data_precision.

This doesn´t make a sense. Damn why is oracle always such a pain. :?
christian_bertram
 
Posts: 16
Joined: Mon 22 Jun 2015 08:38


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