MontoyaTech/MySqlPlus
MontoyaTech/MySqlPlus
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Simplified MySqlColumn by removing Default and Nullable. Added support for built in Nullable types. Bumped package version to 1.1.0

Browse Source
This commit is contained in:
MattMo 2023-02-22 08:06:42 -08:00
parent 7595acb740
commit 15e51b7a42
6 changed files with 102 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
MySqlPlus.Example/Program.cs
View File

@ -10,19 +10,22 @@ namespace MontoyaTech.MySqlPlus.Example
[MySqlRowIndex("year", "year")]
public class Car
{
[MySqlColumn(Id = true, Name = "id", PrimaryKey = true, AutoIncrement = true, Nullable = false)]
[MySqlColumn(Id = true, Name = "id", PrimaryKey = true, AutoIncrement = true)]
public ulong Id = 0;
[MySqlColumn("make")]
public string Make = null;
[MySqlColumn("model", Nullable = false, Type = "VARCHAR(255)")]
[MySqlColumn("model", Type = "VARCHAR(255)")]
public string Model = "Unknown";
[MySqlColumn("year", Nullable = false)]
[MySqlColumn("year")]
public uint Year = 0;
[MySqlColumn("dateCreated", typeof(DateTimeToUnixConverter), DefaultValue = 0, Nullable = false)]
[MySqlColumn("compact")]
public bool? Compact = null;
[MySqlColumn("dateCreated", typeof(DateTimeToUnixConverter), DefaultValue = 0)]
public DateTime DateCreated = DateTime.UtcNow;
}
@ -30,18 +33,21 @@ namespace MontoyaTech.MySqlPlus.Example
{
var session = new MySqlSession("");
if (session.TableExists<Car>())
session.DeleteTable<Car>();
session.CreateTable<Car>();
session.DeleteAll<Car>();
session.Insert(new Car() { Make = "Chevy", Model = "Camaro", Year = 2011 });
session.Insert(new Car() { Make = "Chevy", Model = "Camaro", Year = 2011, Compact = true });
session.Insert(new Car() { Make = "GMC", Model = "Sierra", Year = 2000 });
var cars = session.GetAll<Car>();
foreach (var car in cars)
Console.WriteLine($"Make: {car.Make}, Model: {car.Model}, Year: {car.Year}, DateCreated: {car.DateCreated}");
Console.WriteLine($"Make: {car.Make}, Model: {car.Model}, Year: {car.Year}, Compact: {car.Compact}, DateCreated: {car.DateCreated}");
cars[0].Make = "test";

10
MySqlPlus/MySqlColumn.cs
View File

@ -41,16 +41,6 @@ namespace MontoyaTech.MySqlPlus
/// </summary>
public bool AutoIncrement = false;
/// <summary>
/// Whether or not this column can be null, default is true.
/// </summary>
public bool Nullable = true;
/// <summary>
/// Whether or not this column has a default value, default is true.
/// </summary>
public bool Default = true;
/// <summary>
/// An overrided default value for this column if set, default is null.
/// </summary>

91
MySqlPlus/MySqlColumnExtensions.cs
View File

@ -20,13 +20,13 @@ namespace MontoyaTech.MySqlPlus
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="row"></param>
/// <param name="idField"></param>
/// <param name="field"></param>
/// <param name="idColumn"></param>
public static bool GetMySqlId<T>(this T row, out FieldInfo idField, out MySqlColumn idColumn)
public static bool GetMySqlId<T>(this T row, out FieldInfo field, out MySqlColumn idColumn)
{
var type = typeof(T);
return GetMySqlId(type, out idField, out idColumn);
return GetMySqlId(type, out field, out idColumn);
}
/// <summary>
@ -34,12 +34,12 @@ namespace MontoyaTech.MySqlPlus
/// whether or not we found it.
/// </summary>
/// <param name="type"></param>
/// <param name="idField"></param>
/// <param name="field"></param>
/// <param name="idColumn"></param>
/// <returns></returns>
public static bool GetMySqlId(this Type type, out FieldInfo idField, out MySqlColumn idColumn)
public static bool GetMySqlId(this Type type, out FieldInfo field, out MySqlColumn idColumn)
{
idField = null;
field = null;
idColumn = null;
@ -54,7 +54,7 @@ namespace MontoyaTech.MySqlPlus
if (column != null && column.Id)
{
idField = fields[i];
field = fields[i];
idColumn = column;
return true;
@ -78,9 +78,13 @@ namespace MontoyaTech.MySqlPlus
if (column.Converter != null)
return column.Converter.CreateInstance<MySqlColumnConverter>().ConvertToType;
var code = Type.GetTypeCode(field.FieldType);
var typeCode = Type.GetTypeCode(field.FieldType);
switch (code)
//If the field type is a nullable, get the actual field type.
if (field.FieldType.IsNullable())
typeCode = Type.GetTypeCode(Nullable.GetUnderlyingType(field.FieldType));
switch (typeCode)
{
case TypeCode.Boolean:
return "BOOLEAN";
@ -125,7 +129,7 @@ namespace MontoyaTech.MySqlPlus
return "TINYINT";
default:
throw new NotSupportedException($"Unsupported column type code: {code}");
throw new NotSupportedException($"Unsupported column type code: {typeCode}");
}
}
@ -168,58 +172,97 @@ namespace MontoyaTech.MySqlPlus
//Get our field type code
var typeCode = Type.GetTypeCode(field.FieldType);
//If this field is a nullable, get the underlying type.
bool nullable = false;
if (field.FieldType.IsNullable())
{
typeCode = Type.GetTypeCode(Nullable.GetUnderlyingType(field.FieldType));
nullable = true;
}
//Read the value based on the type code.
switch (typeCode)
{
case TypeCode.Boolean:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(bool) : reader.GetValue(columnIndex).ConvertToType<bool>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(bool)) : reader.GetValue(columnIndex).ConvertToType<bool>());
break;
case TypeCode.Byte:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(byte) : reader.GetValue(columnIndex).ConvertToType<byte>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(byte)) : reader.GetValue(columnIndex).ConvertToType<byte>());
break;
case TypeCode.Char:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(char) : reader.GetValue(columnIndex).ConvertToType<char>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(char)) : reader.GetValue(columnIndex).ConvertToType<char>());
break;
case TypeCode.Decimal:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(decimal) : reader.GetValue(columnIndex).ConvertToType<decimal>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(decimal)) : reader.GetValue(columnIndex).ConvertToType<decimal>());
break;
case TypeCode.DateTime:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(DateTime) : reader.GetValue(columnIndex).ConvertToType<DateTime>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(DateTime)) : reader.GetValue(columnIndex).ConvertToType<DateTime>());
break;
case TypeCode.Double:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(double) : reader.GetValue(columnIndex).ConvertToType<double>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(double)) : reader.GetValue(columnIndex).ConvertToType<double>());
break;
case TypeCode.Int16:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(short) : reader.GetValue(columnIndex).ConvertToType<short>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(short)) : reader.GetValue(columnIndex).ConvertToType<short>());
break;
case TypeCode.Int32:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(int) : reader.GetValue(columnIndex).ConvertToType<int>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(int)) : reader.GetValue(columnIndex).ConvertToType<int>());
break;
case TypeCode.Int64:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(long) : reader.GetValue(columnIndex).ConvertToType<long>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(long)) : reader.GetValue(columnIndex).ConvertToType<long>());
break;
case TypeCode.SByte:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(sbyte) : reader.GetValue(columnIndex).ConvertToType<sbyte>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(sbyte)) : reader.GetValue(columnIndex).ConvertToType<sbyte>());
break;
case TypeCode.Single:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(float) : reader.GetValue(columnIndex).ConvertToType<float>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(float)) : reader.GetValue(columnIndex).ConvertToType<float>());
break;
case TypeCode.String:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(string) : reader.GetValue(columnIndex).ConvertToType<string>());
break;
case TypeCode.UInt16:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(ushort) : reader.GetValue(columnIndex).ConvertToType<ushort>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(ushort)) : reader.GetValue(columnIndex).ConvertToType<ushort>());
break;
case TypeCode.UInt32:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(uint) : reader.GetValue(columnIndex).ConvertToType<uint>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null: default(uint)) : reader.GetValue(columnIndex).ConvertToType<uint>());
break;
case TypeCode.UInt64:
field.SetValue(row, reader.IsDBNull(columnIndex) ? default(ulong) : reader.GetValue(columnIndex).ConvertToType<ulong>());
field.SetValue(row, reader.IsDBNull(columnIndex) ? (nullable ? null : default(ulong)) : reader.GetValue(columnIndex).ConvertToType<ulong>());
break;
default:
throw new NotSupportedException("Unsupported TypeCode");
}
}
}
/// <summary>
/// Returns whether or not a MySqlColumn can be nullable or not based on the field definition and a row.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="column"></param>
/// <param name="field"></param>
/// <param name="row"></param>
/// <returns></returns>
public static bool IsNullable<T>(this MySqlColumn column, FieldInfo field, T row)
{
var fieldType = field.FieldType;
var defaultValue = field.GetValue(row);
if (column.DefaultValue != null)
defaultValue = column.DefaultValue;
if (column.Converter != null)
fieldType = column.Converter.CreateInstance<MySqlColumnConverter>().ConvertTo(defaultValue).GetType();
if (fieldType.IsNullable())
return true;
if (fieldType.IsValueType)
return false;
return true;
}
}
}

16
MySqlPlus/MySqlCommandExtensions.cs
View File

@ -321,11 +321,14 @@ namespace MontoyaTech.MySqlPlus
//Write the column data type
builder.Append($"{column.GetMySqlColumnType(fields[i])} ");
//Determine if this column is nullable
bool nullable = column.IsNullable(field, row);
//Write the column null information
builder.Append($"{(column.Nullable ? "NULL" : "NOT NULL")} ");
builder.Append($"{(nullable ? "NULL" : "NOT NULL")} ");
//Write the column default value if needed. (We can't do this if the column is auto increment)
if (column.Default && !column.AutoIncrement)
if (!column.AutoIncrement)
{
var defaultValue = column.DefaultValue;
@ -333,13 +336,14 @@ namespace MontoyaTech.MySqlPlus
if (defaultValue == null)
defaultValue = field.GetValue(row);
//Quirk, don't do this if the converter is null, and the default is null, and we are nullable.
if (!(column.Converter == null && defaultValue == null && column.Nullable))
{
//If we have a converter, run the converter to get the true default value.
if (column.Converter != null)
defaultValue = column.Converter.CreateInstance<MySqlColumnConverter>().ConvertTo(defaultValue);
builder.Append($"{(column.Default ? $"DEFAULT @{i}" : "")} ");
//If we have a default value, set it on the column.
if (defaultValue != null)
{
builder.Append($"DEFAULT @{i} ");
command.Parameters.AddWithValue($"@{i}", defaultValue);
}

2
MySqlPlus/MySqlPlus.csproj
View File

@ -7,7 +7,7 @@
<AssemblyName>MontoyaTech.MySqlPlus</AssemblyName>
<RootNamespace>MontoyaTech.MySqlPlus</RootNamespace>
<Title>MontoyaTech.MySqlPlus</Title>
<Version>1.0.9</Version>
<Version>1.1.0</Version>
<Company>MontoyaTech</Company>
<Description>A simple C# library to help work with MySql.</Description>
<Copyright>MontoyaTech 2023</Copyright>

10
MySqlPlus/TypeExentions.cs
View File

@ -635,5 +635,15 @@ namespace MontoyaTech.MySqlPlus
}
}
}
/// <summary>
/// Returns whether or not a given type is a System Nullabe type.
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public static bool IsNullable(this Type type)
{
return type.IsGenericType && type.GetGenericTypeDefinition().IsEquivalentTo(typeof(Nullable<>));
}
}
}