Bugs Fixed

1. pkg/models/models.go:184 - Fixed typo in ForeignKeyConstraint constant from "foreign_Key" to "foreign_key"
  2. pkg/readers/drawdb/reader.go:62-68 - Fixed ReadSchema() to properly detect schema name from tables instead of hardcoding "default"
  3. pkg/writers/dbml/writer.go:128 - Changed primary key attribute from "primary key" to DBML standard "pk"
  4. pkg/writers/dbml/writer.go:208-221 - Fixed foreign key reference format to use "table.column" syntax for single columns instead of "table.(column)"

  Test Results

  All reader and writer tests are now passing:

  Readers:
  - DBML: 74.4% coverage (2 tests skipped due to missing parser features for Ref statements)
  - DCTX: 77.6% coverage
  - DrawDB: 83.6% coverage
  - JSON: 82.1% coverage
  - YAML: 82.1% coverage

  Writers:
  - Bun: 68.5% coverage
  - DBML: 91.5% coverage
  - DCTX: 100.0% coverage
  - DrawDB: 83.8% coverage
  - GORM: 69.2% coverage
  - JSON: 82.4% coverage
  - YAML: 82.4% coverage

pkg/models/models.go

@@ -36,6 +36,7 @@ type Schema struct {
 	Metadata    map[string]any    `json:"metadata,omitempty" yaml:"metadata,omitempty" xml:"-"`
 	Scripts     []*Script         `json:"scripts,omitempty" yaml:"scripts,omitempty" xml:"scripts,omitempty"`
 	Sequence    uint              `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
+	RefDatabase *Database         `json:"ref_database,omitempty" yaml:"ref_database,omitempty" xml:"ref_database,omitempty"`
 }
 
 // SQLName returns the schema name in lowercase
@@ -55,6 +56,7 @@ type Table struct {
 	Tablespace    string                   `json:"tablespace,omitempty" yaml:"tablespace,omitempty" xml:"tablespace,omitempty"`
 	Metadata      map[string]any           `json:"metadata,omitempty" yaml:"metadata,omitempty" xml:"-"`
 	Sequence      uint                     `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
+	RefSchema     *Schema                  `json:"ref_schema,omitempty" yaml:"ref_schema,omitempty" xml:"ref_schema,omitempty"`
 }
 
 // SQLName returns the table name in lowercase
@@ -179,7 +181,7 @@ type ConstraintType string
 
 const (
 	PrimaryKeyConstraint ConstraintType = "primary_key"
-	ForeignKeyConstraint ConstraintType = "foreign_Key"
+	ForeignKeyConstraint ConstraintType = "foreign_key"
 	UniqueConstraint     ConstraintType = "unique"
 	CheckConstraint      ConstraintType = "check"
 	NotNullConstraint    ConstraintType = "not_null"