You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
108 lines
3.5 KiB
108 lines
3.5 KiB
package neo4j |
|
|
|
import ( |
|
"context" |
|
"fmt" |
|
) |
|
|
|
// applySchema creates Neo4j constraints and indexes for Nostr events |
|
// Neo4j uses Cypher queries to define schema constraints and indexes |
|
func (n *N) applySchema(ctx context.Context) error { |
|
n.Logger.Infof("applying Nostr schema to neo4j") |
|
|
|
// Create constraints and indexes using Cypher queries |
|
// Constraints ensure uniqueness and are automatically indexed |
|
constraints := []string{ |
|
// Unique constraint on Event.id (event ID must be unique) |
|
"CREATE CONSTRAINT event_id_unique IF NOT EXISTS FOR (e:Event) REQUIRE e.id IS UNIQUE", |
|
|
|
// Unique constraint on Author.pubkey (author public key must be unique) |
|
"CREATE CONSTRAINT author_pubkey_unique IF NOT EXISTS FOR (a:Author) REQUIRE a.pubkey IS UNIQUE", |
|
|
|
// Unique constraint on Marker.key (marker key must be unique) |
|
"CREATE CONSTRAINT marker_key_unique IF NOT EXISTS FOR (m:Marker) REQUIRE m.key IS UNIQUE", |
|
} |
|
|
|
// Additional indexes for query optimization |
|
indexes := []string{ |
|
// Index on Event.kind for kind-based queries |
|
"CREATE INDEX event_kind IF NOT EXISTS FOR (e:Event) ON (e.kind)", |
|
|
|
// Index on Event.created_at for time-range queries |
|
"CREATE INDEX event_created_at IF NOT EXISTS FOR (e:Event) ON (e.created_at)", |
|
|
|
// Index on Event.serial for serial-based lookups |
|
"CREATE INDEX event_serial IF NOT EXISTS FOR (e:Event) ON (e.serial)", |
|
|
|
// Composite index for common query patterns (kind + created_at) |
|
"CREATE INDEX event_kind_created_at IF NOT EXISTS FOR (e:Event) ON (e.kind, e.created_at)", |
|
|
|
// Index on Tag.type for tag-type queries |
|
"CREATE INDEX tag_type IF NOT EXISTS FOR (t:Tag) ON (t.type)", |
|
|
|
// Index on Tag.value for tag-value queries |
|
"CREATE INDEX tag_value IF NOT EXISTS FOR (t:Tag) ON (t.value)", |
|
|
|
// Composite index for tag queries (type + value) |
|
"CREATE INDEX tag_type_value IF NOT EXISTS FOR (t:Tag) ON (t.type, t.value)", |
|
} |
|
|
|
// Execute all constraint creation queries |
|
for _, constraint := range constraints { |
|
if _, err := n.ExecuteWrite(ctx, constraint, nil); err != nil { |
|
return fmt.Errorf("failed to create constraint: %w", err) |
|
} |
|
} |
|
|
|
// Execute all index creation queries |
|
for _, index := range indexes { |
|
if _, err := n.ExecuteWrite(ctx, index, nil); err != nil { |
|
return fmt.Errorf("failed to create index: %w", err) |
|
} |
|
} |
|
|
|
n.Logger.Infof("schema applied successfully") |
|
return nil |
|
} |
|
|
|
// dropAll drops all data from neo4j (useful for testing) |
|
func (n *N) dropAll(ctx context.Context) error { |
|
n.Logger.Warningf("dropping all data from neo4j") |
|
|
|
// Delete all nodes and relationships |
|
_, err := n.ExecuteWrite(ctx, "MATCH (n) DETACH DELETE n", nil) |
|
if err != nil { |
|
return fmt.Errorf("failed to drop all data: %w", err) |
|
} |
|
|
|
// Drop all constraints |
|
constraints := []string{ |
|
"DROP CONSTRAINT event_id_unique IF EXISTS", |
|
"DROP CONSTRAINT author_pubkey_unique IF EXISTS", |
|
"DROP CONSTRAINT marker_key_unique IF EXISTS", |
|
} |
|
|
|
for _, constraint := range constraints { |
|
_, _ = n.ExecuteWrite(ctx, constraint, nil) |
|
// Ignore errors as constraints may not exist |
|
} |
|
|
|
// Drop all indexes |
|
indexes := []string{ |
|
"DROP INDEX event_kind IF EXISTS", |
|
"DROP INDEX event_created_at IF EXISTS", |
|
"DROP INDEX event_serial IF EXISTS", |
|
"DROP INDEX event_kind_created_at IF EXISTS", |
|
"DROP INDEX tag_type IF EXISTS", |
|
"DROP INDEX tag_value IF EXISTS", |
|
"DROP INDEX tag_type_value IF EXISTS", |
|
} |
|
|
|
for _, index := range indexes { |
|
_, _ = n.ExecuteWrite(ctx, index, nil) |
|
// Ignore errors as indexes may not exist |
|
} |
|
|
|
// Reapply schema after dropping |
|
return n.applySchema(ctx) |
|
}
|
|
|