public static string UniqueConflictText(AnnotationValues uniqueAnnotation)
{
if (uniqueAnnotation == null)
{
return(string.Empty);
}
var uniqueText = Convert.ToString(uniqueAnnotation.NewValue, CultureInfo.InvariantCulture);
OnConflictAction action;
if (!uniqueText.StartsWith("OnConflict:", StringComparison.OrdinalIgnoreCase))
{
return(string.Empty);
}
var actionText = uniqueText.Remove(0, "OnConflict:".Length).Trim();
if (!Enum.TryParse(actionText, out action))
{
return(string.Empty);
}
if (action == OnConflictAction.None)
{
return(string.Empty);
}
return(" ON CONFLICT " + action.ToString().ToUpperInvariant());
}
public void Properties_return_expected_values()
{
var pair = new AnnotationValues("old", "new");
Assert.Equal("old", pair.OldValue);
Assert.Equal("new", pair.NewValue);
}
private void GenerateColumnDescription(AnnotationValues annotationValues, string tableName, string columnName)
{
if (annotationValues == null)
{
return;
}
var oldDescription = annotationValues.OldValue as string;
var newDescription = annotationValues.NewValue as string;
// Drop description.
if (oldDescription != null)
{
using (var writer = Writer())
{
DropColumnDescription(writer, tableName, columnName);
Statement(writer);
}
}
// Create description.
if (newDescription != null)
{
using (var writer = Writer())
{
CreateColumnDescription(writer, tableName, columnName, newDescription);
Statement(writer);
}
}
}
private void GenerateColumnDefaultValue(AnnotationValues annotationValues, string tableName, string columnName)
{
if (annotationValues == null)
{
return;
}
var oldValue = annotationValues.OldValue as string;
var newValue = annotationValues.NewValue as string;
// Drop default value.
if (oldValue != null)
{
using (var writer = Writer())
{
DropColumnDefaultConstraint(writer, tableName, columnName, null);
Statement(writer);
}
}
// Create default value.
if (newValue != null)
{
using (var writer = Writer())
{
CreateColumnDefaultConstraint(writer, tableName, columnName, null, newValue);
Statement(writer);
}
}
}
/// <summary>Sets annotation on the specified item.</summary>
/// <param name="item">The item to annotate.</param>
/// <param name="annotationName">The name of the annotation to set.</param>
/// <param name="annotationValue">The value of the annotation to set.</param>
/// <remarks>If the item already has annotation of the specified name this method will overwrite it.</remarks>
public void SetAnnotation(T item, string annotationName, object annotationValue)
{
AnnotationValues a;
if (!this.annotations.TryGetValue(item, out a))
{
a = new AnnotationValues();
this.annotations[item] = a;
}
a.SetAnnotation(annotationName, annotationValue);
}
/// <summary>
/// 写入列注释
/// </summary>
/// <param name="o">保存注释的对象。</param>
/// <param name="f">原有生成代码的方法。</param>
/// <param name="f">写入注释的方法。</param>
public static void WriteComment(this IDictionary <string, AnnotationValues> o, Action gen, Action <string> f)
{
bool hasComment = o.ContainsKey(key);
AnnotationValues comment = hasComment ? o[key] : null;
//开始执行
if (hasComment)
{
o.Remove(key);
}
gen();
if (hasComment)
{
f(comment.NewValue as string ?? string.Empty);
o.Add(key, comment);
}
}
public static string CollateFunctionText(AnnotationValues collateAnnotation)
{
if (collateAnnotation == null)
{
return(string.Empty);
}
var collateAttributeText = Convert.ToString(collateAnnotation.NewValue, CultureInfo.InvariantCulture);
string collateFunction;
string collateCustomFunction;
if (collateAttributeText.IndexOf(':') > -1)
{
collateFunction = collateAttributeText.Substring(0, collateAttributeText.IndexOf(':'));
collateCustomFunction = collateAttributeText.Remove(0, collateAttributeText.IndexOf(':') + 1).Trim();
}
else
{
collateFunction = collateAttributeText;
collateCustomFunction = string.Empty;
}
CollationFunction colatteFunctionType;
if (!Enum.TryParse(collateFunction, out colatteFunctionType))
{
return(string.Empty);
}
if (colatteFunctionType == CollationFunction.None)
{
return(string.Empty);
}
return(colatteFunctionType == CollationFunction.Custom
? " COLLATE " + collateCustomFunction
: " COLLATE " + colatteFunctionType.ToString().ToUpperInvariant());
}
private bool GenerateColumnDefaultConstraint(AnnotationValues annotationValues, string tableName, string columnName)
{
if (annotationValues == null)
{
return(false);
}
var oldValue = annotationValues.OldValue as string;
var newValue = annotationValues.NewValue as string;
var modified = false;
// Drop default value.
if (oldValue != null)
{
var config = DefaultConstraintConfiguration.Deserialize(oldValue);
using (var writer = Writer())
{
DropColumnDefaultConstraint(writer, tableName, columnName, config.Name);
Statement(writer);
}
modified = true;
}
// Create default value.
if (newValue != null)
{
var config = DefaultConstraintConfiguration.Deserialize(newValue);
using (var writer = Writer())
{
CreateColumnDefaultConstraint(writer, tableName, columnName, config.Name, config.Value);
Statement(writer);
}
modified = true;
}
return(modified);
}