public static string BuildCreate(
TableMetadata metadata,
bool onlyIfNotExists = false)
{
StringBuilder sqlCreate = new StringBuilder();
StringBuilder sqlIndexes = new StringBuilder();
var name = metadata.TableName;
var schema = metadata.Schema;
var keys = metadata.Properties.Where(x => x.IsPK).ToList();
var nonkeys = metadata.Properties.Where(x => !x.IsPK).ToList();
if (onlyIfNotExists)
{
sqlCreate.AppendFormat("IF NOT EXISTS (" +
"SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[{1}].[{0}]') AND type in (N'U'))\r\nBEGIN\r\n", name, schema);
}
sqlCreate.AppendFormat("CREATE TABLE [{1}].[{0}](\r\n", name, schema??"dbo");
if (!keys.Any() || keys.Count() > 1)
{
throw new Exception("This only support entites with exactly one key property at the moment.");
}
var pk = keys.First();
sqlCreate.AppendFormat(" [{0}] {1} NOT NULL,\r\n", pk.ColumnName, pk.SqlKeyTypeString);
var keyColumns = string.Join(",", keys.Select(x => string.Format("[{0}] ASC", x.ColumnName)).ToArray());
var constraint = string.Format("CONSTRAINT [PK_{0}] PRIMARY KEY CLUSTERED ( {1} )", name, keyColumns);
foreach (var propertyMetadata in nonkeys)
{
sqlCreate.AppendFormat(" [{0}] {1} {2},\r\n",
propertyMetadata.ColumnName,
propertyMetadata.SqlTypeString,
propertyMetadata.Nullable ? "NULL" : "NOT NULL");
// INDEX
if (propertyMetadata.Indexed)
{
sqlIndexes.AppendFormat("CREATE NONCLUSTERED INDEX IX_{0}_{1} ON {0}({1})\r\n", name, propertyMetadata.ColumnName);
}
}
sqlCreate.AppendLine(constraint);
sqlCreate.AppendFormat(");\r\n");
sqlCreate.Append(sqlIndexes);
if (onlyIfNotExists)
{
sqlCreate.AppendFormat("END\r\n");
}
return sqlCreate.ToString();
}
public static string BuildColumnList(
TableMetadata metadata,
bool withoutKeys = false)
{
return string.Join(",", metadata
.Properties
.Where(x => !withoutKeys || !x.IsPK)
.OrderBy(x => x.ColumnName)
.Select(x => string.Format("[{0}]", x.ColumnName)).ToArray());
}
public static string BuildDelete(
TableMetadata metadata)
{
var schema = GetSchema(metadata);
return string.Format("DELETE FROM {0}[{1}] WHERE {2}",
schema,
metadata.TableName,
BuildWhereClause(metadata)
);
}
public void MetadataForClass()
{
var metadata = new TableMetadata();
MetadataHelper.MetadataForClass(typeof(TestClass), ref metadata);
Assert.AreEqual("TestClass", metadata.ClassName);
Assert.AreEqual("SqlTable", metadata.TableName);
Assert.AreEqual(6, metadata.Properties.Count);
Assert.AreEqual(1, metadata.Properties.Count(x => x.IsPK));
}
public static string GetSchema(TableMetadata metadata)
{
var schema = String.Empty;
if (!String.IsNullOrWhiteSpace(metadata.Schema))
{
schema = string.Format("[{0}].", metadata.Schema);
}
return schema;
}
public static string BuildWhereClause(
TableMetadata metadata)
{
if (metadata == null)
throw new ArgumentException("No metadata provided (null).", "metadata");
var sb = new StringBuilder();
var first = true;
foreach (var propMetadata in metadata.Properties.Where(x=>x.IsPK))
{
if (!first) sb.Append(" AND ");
var propertyName = GetVariableName(propMetadata);
sb.AppendFormat("[{0}]={1}", propMetadata.ColumnName, propertyName);
first = false;
}
return sb.ToString();
}
public static string BuildWhereClause(
TableMetadata metadata,
Dictionary<string, object> values,
ref Dictionary<string, object> parameters)
{
if (metadata == null)
throw new ArgumentException("No metadata provided (null).", "metadata");
if (!values.Any())
throw new ArgumentException("At least one key value is required.", "values");
var sb = new StringBuilder();
var first = true;
foreach (var where in values)
{
var propMetadata = metadata.Properties.FirstOrDefault(x => x.PropertyName.Equals(where.Key));
if (propMetadata == null)
throw new ArgumentException(string.Format("Could not find property {0} in metadata.", where.Key), "values");
if (!first) sb.Append(" AND ");
var propertyName = FindUniqueNameInDictionary(GetVariableName(propMetadata), parameters);
sb.AppendFormat("[{0}]={1}", propMetadata.ColumnName, propertyName);
parameters.Add(propertyName, where.Value);
first = false;
}
return sb.ToString();
}
public static string BuildUpdate(
TableMetadata metadata,
bool withoutKeys = true)
{
var schema = GetSchema(metadata);
return string.Format("UPDATE {0}[{1}] SET {2} WHERE {3}",
schema,
metadata.TableName,
BuildParameterSettingList(metadata, withoutKeys: withoutKeys),
BuildWhereClause(metadata)
);
}
public static string BuildSelectWithCustomColumns(
TableMetadata metadata,
string customColumns)
{
var schema = GetSchema(metadata);
return string.Format("SELECT {0} FROM {1}[{2}]",
customColumns,
schema,
metadata.TableName);
}
public static string BuildExistsTable(TableMetadata metadata)
{
var name = metadata.TableName;
var schema = metadata.Schema;
return string.Format("SELECT 1 FROM sys.objects WHERE object_id = OBJECT_ID(N'[{1}].[{0}]') AND type in (N'U')",name, schema);
}
public static string BuildSelect(
TableMetadata metadata,
Dictionary<string, object> values,
ref Dictionary<string, object> parameters)
{
var schema = String.Empty;
if (!String.IsNullOrWhiteSpace(metadata.Schema))
{
schema = string.Format("[{0}].", metadata.Schema);
}
return string.Format("SELECT {0} FROM {1}[{2}] WHERE {3}",
BuildMappedColumnList(metadata),
schema,
metadata.TableName,
BuildWhereClause(metadata, values, ref parameters));
}
public static string BuildSelect(
TableMetadata metadata)
{
var schema = GetSchema(metadata);
return string.Format("SELECT {0} FROM {1}[{2}]",
BuildMappedColumnList(metadata),
schema,
metadata.TableName);
}
public static string BuildParameterSettingList(
TableMetadata metadata,
bool withoutKeys = true)
{
if (metadata == null)
throw new ArgumentException("No metadata provided (null).", "metadata");
var insertProperties = metadata
.Properties
.Where(x => !withoutKeys || !x.IsPK);
return string.Join(",",
insertProperties
.OrderBy(x => x.ColumnName)
.Select(x=>string.Format("[{0}]={1}", x.ColumnName, GetVariableName(x)))
.ToArray());
}
public static void BuildParameters(
TableMetadata metadata,
Dictionary<string, object> values,
ref Dictionary<string, object> parameters)
{
if (metadata == null)
throw new ArgumentException("No metadata provided (null).", "metadata");
if (!values.Any())
throw new ArgumentException("At least one key value is required.", "values");
foreach (var where in values)
{
var propMetadata = metadata.Properties.FirstOrDefault(x => x.PropertyName.Equals(where.Key));
if (propMetadata != null)
{
var propertyName = GetVariableName(propMetadata);
parameters.Add(propertyName, where.Value);
}
}
}
public static string BuildInsert(
TableMetadata metadata,
bool withoutKeys = true)
{
var schema = GetSchema(metadata);
return string.Format("INSERT INTO {0}[{1}] ({2}) VALUES ({3})",
schema,
metadata.TableName,
BuildColumnList(metadata, withoutKeys: withoutKeys),
BuildParameterList(metadata, withoutKeys: withoutKeys)
);
}
public static string BuildExists(
TableMetadata metadata)
{
var schema = GetSchema(metadata);
return string.Format("SELECT (1) FROM {0}[{1}] WHERE {2}",
schema,
metadata.TableName,
BuildWhereClause(metadata));
}
private static TableMetadata GetTestMetadata()
{
var tableMD = new TableMetadata();
tableMD.TableName = "testtable";
tableMD.Properties.Add(new PropertyMetadata()
{
IsPK= true,
ColumnName = "a",
PropertyName = "aa"
});
tableMD.Properties.Add(new PropertyMetadata()
{
ColumnName = "b",
PropertyName = "bb"
});
tableMD.Properties.Add(new PropertyMetadata()
{
ColumnName = "c",
PropertyName = "cc"
});
return tableMD;
}
public static string BuildSelectStar(
TableMetadata metadata)
{
return BuildSelectWithCustomColumns(metadata, "*");
}
