feat(ingestion/dbt): add support for ingesting DBT contracts as Data Contracts #15428
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…Contracts Add support for extracting DBT model contracts (contract.enforced=true) and creating DataHub Data Contract entities with schema assertions. Key changes: - Add DBTContract and DBTConstraint dataclasses for contract/constraint data - Extract contract configuration and constraints from manifest files - Add configuration options: ingest_contracts, contract_test_tag, ingest_column_constraints_as_assertions - Create schema assertions from contracted model columns - Create constraint assertions for not_null, unique, primary_key - Support tagged tests as data quality assertions in contracts - Add best-effort dbt Cloud support via meta field - Add unit tests for contract functionality Closes datahub-project#11927
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Summary
Add support for ingesting DBT model contracts (introduced in dbt 1.5) as DataHub Data Contract entities with schema and data quality assertions.
Closes #11927
What problem does this solve?
DBT introduced model contracts in v1.5, allowing teams to define and enforce schema guarantees on models. However, DataHub had no way to ingest this contract metadata - it was lost during ingestion, and users couldn't see which models had contractual guarantees.
This PR bridges DBT's data governance (contracts) with DataHub's data governance (Data Contracts, Assertions), giving teams a unified view of their data quality guarantees.
What changes are being made?
New Configuration Options
ingest_contractsfalsecontract_test_tag"contract"ingest_column_constraints_as_assertionstruenot_null,unique,primary_keyconstraintsNew Data Structures
DBTContractdataclass - capturesenforced,alias_types,checksumfrom manifestDBTConstraintdataclass - captures column/model-level constraints (not_null,unique,primary_key, etc.)Contract Ingestion Flow
When
ingest_contracts: trueand a model hascontract.enforced: true:not_null,unique,primary_keyconstraintscontract_test_tagare linkedDataContractPropertiesClassPlatform Support
meta.contractormeta.datahub_contract(API doesn't expose contracts directly)How was this tested?
DBTContract,DBTConstraint)contract.enforced: trueChecklist
Screenshots/Demo
After ingestion with
ingest_contracts: true, models withcontract.enforced: truewill have:not_null/unique/primary_key