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feat: add table relation #214

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Merged
XiaJunjie2020 merged 1 commit into from
Sep 24, 2025
Merged

feat: add table relation #214

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83 changes: 43 additions & 40 deletions backend/apps/datasource/crud/datasource.py
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Original file line number Diff line number Diff line change
Expand Up @@ -392,45 +392,48 @@ def get_table_schema(session: SessionDep, current_user: CurrentUser, ds: CoreDat
# field relation
if tables and ds.table_relation:
relations = list(filter(lambda x: x.get('shape') == 'edge', ds.table_relation))
# Complete the missing table
# get tables in relation, remove irrelevant relation
embedding_table_ids = [s.get('id') for s in tables]
all_relations = list(filter(lambda x: x.get('source').get('cell') in embedding_table_ids or x.get('target').get(
'cell') in embedding_table_ids, relations))

# get relation table ids, sub embedding table ids
relation_table_ids = []
for r in all_relations:
relation_table_ids.append(r.get('source').get('cell'))
relation_table_ids.append(r.get('target').get('cell'))
relation_table_ids = list(set(relation_table_ids))
# get table dict
table_records = session.query(CoreTable).filter(CoreTable.id.in_(list(map(int, relation_table_ids)))).all()
table_dict = {}
for ele in table_records:
table_dict[ele.id] = ele.table_name

# get lost table ids
lost_table_ids = list(set(relation_table_ids) - set(embedding_table_ids))
# get lost table schema and splice it
lost_tables = list(filter(lambda x: x.get('id') in lost_table_ids, all_tables))
if lost_tables:
for s in lost_tables:
schema_str += s.get('schema_table')

# get field dict
relation_field_ids = []
for relation in all_relations:
relation_field_ids.append(relation.get('source').get('port'))
relation_field_ids.append(relation.get('target').get('port'))
relation_field_ids = list(set(relation_field_ids))
field_records = session.query(CoreField).filter(CoreField.id.in_(list(map(int, relation_field_ids)))).all()
field_dict = {}
for ele in field_records:
field_dict[ele.id] = ele.field_name

schema_str += '【Foreign keys】\n'
for ele in all_relations:
schema_str += f"{table_dict.get(int(ele.get('source').get('cell')))}.{field_dict.get(int(ele.get('source').get('port')))}={table_dict.get(int(ele.get('target').get('cell')))}.{field_dict.get(int(ele.get('target').get('port')))}\n"
if relations:
# Complete the missing table
# get tables in relation, remove irrelevant relation
embedding_table_ids = [s.get('id') for s in tables]
all_relations = list(
filter(lambda x: x.get('source').get('cell') in embedding_table_ids or x.get('target').get(
'cell') in embedding_table_ids, relations))

# get relation table ids, sub embedding table ids
relation_table_ids = []
for r in all_relations:
relation_table_ids.append(r.get('source').get('cell'))
relation_table_ids.append(r.get('target').get('cell'))
relation_table_ids = list(set(relation_table_ids))
# get table dict
table_records = session.query(CoreTable).filter(CoreTable.id.in_(list(map(int, relation_table_ids)))).all()
table_dict = {}
for ele in table_records:
table_dict[ele.id] = ele.table_name

# get lost table ids
lost_table_ids = list(set(relation_table_ids) - set(embedding_table_ids))
# get lost table schema and splice it
lost_tables = list(filter(lambda x: x.get('id') in lost_table_ids, all_tables))
if lost_tables:
for s in lost_tables:
schema_str += s.get('schema_table')

# get field dict
relation_field_ids = []
for relation in all_relations:
relation_field_ids.append(relation.get('source').get('port'))
relation_field_ids.append(relation.get('target').get('port'))
relation_field_ids = list(set(relation_field_ids))
field_records = session.query(CoreField).filter(CoreField.id.in_(list(map(int, relation_field_ids)))).all()
field_dict = {}
for ele in field_records:
field_dict[ele.id] = ele.field_name

if all_relations:
schema_str += '【Foreign keys】\n'
for ele in all_relations:
schema_str += f"{table_dict.get(int(ele.get('source').get('cell')))}.{field_dict.get(int(ele.get('source').get('port')))}={table_dict.get(int(ele.get('target').get('cell')))}.{field_dict.get(int(ele.get('target').get('port')))}\n"

return schema_str