[Mono-dev] DataColumn.DefaultValue fixes
Atsushi Eno
atsushi at ximian.com
Thu Jun 12 12:54:53 EDT 2008
Sure, you are right. I'll make that change. Thanks.
Atsushi Eno
Gert Driesen wrote:
> Atsushi,
>
> I wouldn't use the ExpectedException attribute on the Defaults3 tests,
> as it allows for false positives (if any of the other calls results in
> an ArgumentException).
>
> Instead just use this (more verbose but) correcter code:
>
> try {
> col.DefaultValue = DBNull.Value; // throws. DBNull is not allowed!
> Assert.Fail ("#3");
> } catch (ArgumentException) {
> }
>
> Just a tiny detail, I know...
>
> Gert
>
> --------------------------------------------------
> From: "Atsushi Eno" <atsushi at ximian.com>
> Sent: Thursday, June 12, 2008 6:06 PM
> To: <mono-devel-list at lists.ximian.com>
> Subject: [Mono-dev] DataColumn.DefaultValue fixes
>
>> Hello,
>>
>> I have a fix for one of failing sys.data test in 2.0 profile. Here
>> is description (could be used for ChangeLog):
>>
>> * System.Data/DataColumn.cs
>> DefaultValue can be non-DBNull. For SqlXxx type, it becomes
>> SqlXxx.Null. Also, changing DataType may change DefaultValue
>> to be consistent with the new type (say, having int DefaultValue
>> for new string DataType is wrong).
>>
>> * System.Data/XmlSchemaWriter.cs
>> This should be fixed to take non-DBNull default value into
>> consideration.
>>
>> * Test/System.Data/DataTableTest.cs, Test/System.Data/DataSetTest.cs
>> We could use default value as is, not in string form. This makes
>> comparison more strict.
>>
>> * Test/System.Data/DataColumnTest.cs
>> Added test for non-DBNull case and changing DataType case.
>>
>> If it looks good, I'll check in it later.
>>
>> Atsushi Eno
>>
>>
>
>
>
>> Index: Test/System.Data/DataColumnTest.cs
>> ===================================================================
>> --- Test/System.Data/DataColumnTest.cs (revision 105623)
>> +++ Test/System.Data/DataColumnTest.cs (working copy)
>> @@ -38,6 +38,7 @@
>> using System;
>> using System.ComponentModel;
>> using System.Data;
>> +using System.Data.SqlTypes;
>>
>> using NUnit.Framework;
>>
>> @@ -326,6 +327,42 @@
>> }
>>
>> [Test]
>> +#if !NET_2_0
>> + [ExpectedException (typeof (ArgumentException))]
>> +#endif
>> + public void Defaults3 ()
>> + {
>> + DataColumn col = new DataColumn ("foo", typeof (SqlBoolean));
>> +#if NET_2_0
>> + Assert.AreEqual (SqlBoolean.Null, col.DefaultValue, "#1");
>> + col.DefaultValue = SqlBoolean.True;
>> + // FIXME: not working yet
>> + //col.DefaultValue = true;
>> + //Assert.AreEqual (SqlBoolean.True, col.DefaultValue, "#2"); // not
>> bool but SqlBoolean
>> + col.DefaultValue = DBNull.Value;
>> + Assert.AreEqual (SqlBoolean.Null, col.DefaultValue, "#3"); // not
>> DBNull
>> +#else
>> + Assert.AreEqual (DBNull.Value, col.DefaultValue, "#1");
>> + col.DefaultValue = true;
>> + Assert.AreEqual (true, col.DefaultValue, "#2");
>> + col.DefaultValue = DBNull.Value; // throws. DBNull is not allowed!
>> +#endif
>> + }
>> +
>> + [Test]
>> +#if NET_2_0
>> + [ExpectedException (typeof (DataException))]
>> +#else
>> + [ExpectedException (typeof (ArgumentException))]
>> +#endif
>> + public void ChangeTypeAfterSettingDefaultValue ()
>> + {
>> + DataColumn col = new DataColumn ("foo", typeof (SqlBoolean));
>> + col.DefaultValue = true;
>> + col.DataType = typeof (int);
>> + }
>> +
>> + [Test]
>> public void ExpressionSubstringlimits () {
>> DataTable t = new DataTable ();
>> t.Columns.Add ("aaa");
>> Index: Test/System.Data/DataTableTest.cs
>> ===================================================================
>> --- Test/System.Data/DataTableTest.cs (revision 105623)
>> +++ Test/System.Data/DataTableTest.cs (working copy)
>> @@ -2793,7 +2793,8 @@
>> Assert.AreEqual ("Element", column2.ColumnMapping.ToString (),
>> "test#33");
>> Assert.AreEqual ("second", column2.ColumnName, "test#34");
>> Assert.AreEqual ("System.Data.SqlTypes.SqlGuid",
>> column2.DataType.ToString (), "test#35");
>> - Assert.AreEqual ("Null", column2.DefaultValue.ToString (), "test#36");
>> + Assert.AreEqual (SqlGuid.Null, column2.DefaultValue, "test#36");
>> + Assert.AreEqual (typeof (SqlGuid), column2.DefaultValue.GetType (),
>> "test#36-2");
>> Assert.IsFalse (column2.DesignMode, "test#37");
>> Assert.AreEqual ("", column2.Expression, "test#38");
>> Assert.AreEqual (-1, column2.MaxLength, "test#39");
>> Index: Test/System.Data/DataSetTest.cs
>> ===================================================================
>> --- Test/System.Data/DataSetTest.cs (revision 105623)
>> +++ Test/System.Data/DataSetTest.cs (working copy)
>> @@ -133,7 +133,11 @@
>> Assert.AreEqual ("Element", column2.ColumnMapping.ToString (),
>> "test#33");
>> Assert.AreEqual ("second", column2.ColumnName, "test#34");
>> Assert.AreEqual ("System.Data.SqlTypes.SqlGuid",
>> column2.DataType.ToString (), "test#35");
>> - Assert.AreEqual ("", column2.DefaultValue.ToString (), "test#36");
>> +#if NET_2_0
>> + Assert.AreEqual (SqlGuid.Null, column2.DefaultValue, "test#36");
>> +#else
>> + Assert.AreEqual (DBNull.Value, column2.DefaultValue, "test#36");
>> +#endif
>> Assert.IsFalse (column2.DesignMode, "test#37");
>> Assert.AreEqual ("", column2.Expression, "test#38");
>> Assert.AreEqual (-1, column2.MaxLength, "test#39");
>> Index: System.Data/XmlSchemaWriter.cs
>> ===================================================================
>> --- System.Data/XmlSchemaWriter.cs (revision 105623)
>> +++ System.Data/XmlSchemaWriter.cs (working copy)
>> @@ -678,7 +678,7 @@
>> XmlConvert.ToString (col.AutoIncrementStep));
>> }
>>
>> - if (col.DefaultValue.ToString () != String.Empty)
>> + if (!DataColumn.GetDefaultValueForType (col.DataType).Equals
>> (col.DefaultValue))
>> w.WriteAttributeString ("default",
>> DataSet.WriteObjectXml (col.DefaultValue));
>>
>> @@ -792,7 +792,7 @@
>>
>> if (!col.AllowDBNull)
>> w.WriteAttributeString ("use", "required");
>> - if (col.DefaultValue.ToString () != String.Empty)
>> + if (col.DefaultValue != DataColumn.GetDefaultValueForType
>> (col.DataType))
>> w.WriteAttributeString ("default",
>> DataSet.WriteObjectXml (col.DefaultValue));
>>
>> Index: System.Data/DataColumn.cs
>> ===================================================================
>> --- System.Data/DataColumn.cs (revision 105623)
>> +++ System.Data/DataColumn.cs (working copy)
>> @@ -90,7 +90,7 @@
>> private string _caption;
>> private MappingType _columnMapping;
>> private string _columnName = String.Empty;
>> - private object _defaultValue = DBNull.Value;
>> + private object _defaultValue = GetDefaultValueForType (null);
>> private string _expression;
>> private IExpression _compiledExpression;
>> private PropertyCollection _extendedProperties = new
>> PropertyCollection ();
>> @@ -465,6 +465,8 @@
>> throw new
>> InvalidConstraintException ("Cannot change datatype, " +
>>
>> "when column is part of a relation");
>>
>> + Type prevType = _dataContainer != null ? _dataContainer.Type : null;
>> // current
>> +
>> #if NET_2_0
>> if (_dataContainer != null && _dataContainer.Type == typeof (DateTime))
>> _datetimeMode = DataSetDateTime.UnspecifiedLocal;
>> @@ -482,6 +484,13 @@
>> AutoIncrement = false;
>> }
>> }
>> +
>> + if (DefaultValue != GetDefaultValueForType (prevType))
>> + SetDefaultValue (DefaultValue, true);
>> +#if NET_2_0
>> + else
>> + _defaultValue = GetDefaultValueForType (DataType);
>> +#endif
>> }
>> }
>>
>> @@ -507,9 +516,15 @@
>> throw new ArgumentException("Can not set default value while" +
>> " AutoIncrement is true on this column.");
>> }
>> + SetDefaultValue (value, false);
>> + }
>> + }
>>
>> + void SetDefaultValue (object value, bool forcedTypeCheck)
>> + {
>> + {
>> object tmpObj;
>> - if (!this._defaultValue.Equals(value)) {
>> + if (forcedTypeCheck|| !this._defaultValue.Equals(value)) {
>> if (value == null) {
>> tmpObj = DBNull.Value;
>> }
>> @@ -517,16 +532,24 @@
>> tmpObj = value;
>> }
>>
>> - if ((this.DataType != typeof (object))&& (tmpObj != DBNull.Value)) {
>> + if (!this.DataType.IsInstanceOfType (tmpObj) && tmpObj !=
>> DBNull.Value) {
>> try {
>> //Casting to the new type
>> tmpObj= Convert.ChangeType(tmpObj,this.DataType);
>> }
>> catch (InvalidCastException) {
>> - throw new InvalidCastException("Default Value type is not compatible
>> with" +
>> - " column type.");
>> + string msg = String.Format ("Default Value of type '{0}' is not
>> compatible with column type '{1}'", tmpObj.GetType (), DataType);
>> +#if NET_2_0
>> + throw new DataException(msg);
>> +#else
>> + throw new ArgumentException(msg);
>> +#endif
>> }
>> }
>> +#if NET_2_0
>> + if (tmpObj == DBNull.Value)
>> + tmpObj = GetDefaultValueForType (DataType);
>> +#endif
>> _defaultValue = tmpObj;
>> }
>>
>> @@ -1004,6 +1027,19 @@
>> #endif
>> return true;
>> }
>> +
>> + internal static object GetDefaultValueForType (Type type)
>> + {
>> +#if NET_2_0
>> + if (type == null)
>> + return DBNull.Value;
>> + if (type.Namespace == "System.Data.SqlTypes" && type.Assembly ==
>> typeof (DataColumn).Assembly)
>> + // For SqlXxx types, set SqlXxx.Null instead of DBNull.Value.
>> + return Activator.CreateInstance (type);
>> +#endif
>> + return DBNull.Value;
>> + }
>> +
>> #endregion // Methods
>> }
>> }
>>
>
>
>
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>>
>
>
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