public TableSpecification CreateTable(string tableName)
{
var gene = new CreateTableGene(_gene, tableName, Prerequisites);
EvolutionHistoryBuilder.Append(gene);
gene.AddToParent();
return(new TableSpecification(gene, EvolutionHistoryBuilder));
}
public CustomSqlSpecification Execute(string up, string down = null)
{
var gene = new CustomSqlGene(_databaseName, up, down, Prerequisites);
EvolutionHistoryBuilder.Append(gene);
gene.AddToParent();
return(new CustomSqlSpecification(gene, EvolutionHistoryBuilder));
}
public SchemaSpecification UseSchema(string schemaName)
{
var gene = new UseSchemaGene(_databaseName, schemaName, Prerequisites);
EvolutionHistoryBuilder.Append(gene);
gene.AddToParent();
return(new SchemaSpecification(gene, EvolutionHistoryBuilder));
}
public void DropColumn()
{
var childGene = new DropColumnGene(
_gene,
Prerequisites);
EvolutionHistoryBuilder.Append(childGene);
childGene.AddToParent();
}
public IndexSpecification CreateIndex(params ColumnSpecification[] columns)
{
var childGene = new CreateIndexGene(
_gene,
columns.Select(c => c.Gene),
Prerequisites);
EvolutionHistoryBuilder.Append(childGene);
childGene.AddToParent();
return(new IndexSpecification(childGene, EvolutionHistoryBuilder));
}
private ColumnSpecification CreateColumn(string columnName, string typeDescriptor, bool nullable)
{
var childGene = new CreateColumnGene(
_gene,
columnName,
typeDescriptor,
nullable,
Prerequisites);
EvolutionHistoryBuilder.Append(childGene);
childGene.AddToParent();
return(new ColumnSpecification(childGene, EvolutionHistoryBuilder));
}
public ForeignKeySpecification CreateForeignKey(PrimaryKeySpecification referencing, bool cascadeDelete = false, bool cascadeUpdate = false)
{
var childGene = new CreateForeignKeyGene(
_gene,
referencing.Gene,
cascadeDelete,
cascadeUpdate,
Prerequisites);
EvolutionHistoryBuilder.Append(childGene);
childGene.AddToParent();
return(new ForeignKeySpecification(EvolutionHistoryBuilder));
}
public void AddGene(Gene gene)
{
var genesAffected = new EvolutionHistoryBuilder();
genesAffected.Append(gene);
string[] rollbackSql = gene.GenerateRollbackSql(genesAffected, this);
var mementos = genesAffected.EvolutionHistory.GetMementos().ToList();
string[] deleteStatements = GenerateDeleteStatements(_databaseName, mementos);
_sql = _sql.InsertRange(0, deleteStatements);
_sql = _sql.InsertRange(0, rollbackSql);
_ahead = _ahead.Subtract(genesAffected.EvolutionHistory);
}
public bool AddGene(Gene gene)
{
if (_working.Contains(gene))
{
return(false);
}
foreach (var prerequisite in gene.AllPrerequisites
.Where(p => _difference.Contains(p)))
{
if (!AddGene(prerequisite))
{
return(false);
}
}
_working = _working.Push(gene);
var genesAffected = new EvolutionHistoryBuilder();
genesAffected.Append(gene);
string[] result = gene.GenerateSql(genesAffected, this);
_sql = _sql.AddRange(result);
var mementos = genesAffected.EvolutionHistory.GetMementos().ToList();
_sql = _sql.Add(GenerateInsertStatement(_databaseName, mementos));
if (mementos.SelectMany(m => m.Prerequisites).SelectMany(p => p.Value).Any())
{
_sql = _sql.Add(GeneratePrerequisiteInsertStatements(_databaseName, mementos));
}
_difference = _difference.Subtract(genesAffected.EvolutionHistory);
_working = _working.Pop();
return(true);
}
