models

type Document struct {
	Model

	// A Namespace has many Documents.
	NamespaceID uint `gorm:"not null;index"`

	// A Document has many Texts.
	Texts []Text `gorm:"constraint:OnDelete:CASCADE"`

	// A Document has many Tags.
	Tags []Tag `gorm:"constraint:OnDelete:CASCADE"`
}

type Model struct {
	ID        uint      `gorm:"primaryKey"`
	CreatedAt time.Time `gorm:"not null;default:now()"`
	UpdatedAt time.Time `gorm:"not null;default:now()"`
}

type Namespace struct {
	Model

	Name string `gorm:"not null;uniqueIndex"`

	// A Namespace has many Documents.
	Documents []Document `gorm:"constraint:OnDelete:CASCADE"`
}

type Tag struct {
	Model

	// A Document has many Tags.
	DocumentID uint `gorm:"not null;index"`

	Value string `gorm:"not null;index"`
}

type Term struct {
	Model

	// A Text has many Terms.
	TextID uint `gorm:"not null;index"`

	// Value is the textual value of the term, which is a text token
	// such as a lemma, a single or compound word, etc.
	Value string `gorm:"not null;index"`

	// PositionInText allows the Term to be optionally associated to a
	// portion of Text. It is useful for highlighting.
	// The range represents the indices/positions of unicode code points
	// (runes) from the associated Text.
	PositionInText pgtype.Int8range `gorm:"type:int8range;null"`

	// Highlightable indicates whether this Term can be used as a candidate
	// for search results' highlighting.
	// It is ignored if PositionInText is null or an empty range.
	Highlightable bool `gorm:"not null;index"`
}

type Text struct {
	Model

	// A Document has many Texts.
	DocumentID uint `gorm:"not null;index;uniqueIndex:idx_unique_text_index_per_document"`

	Index int `gorm:"not null;index;uniqueIndex:idx_unique_text_index_per_document"`

	Value string `gorm:"not null"`

	// A Text has many Terms.
	Terms []Term `gorm:"constraint:OnDelete:CASCADE"`
}