Eng 2735 Add order by and limit parameters for V2 workflow results

integration_tests/backend/test_reads.py

@@ -17,7 +17,9 @@
 
 
 class TestBackend:
+    # V2
     GET_WORKFLOWS_TEMPLATE = "/api/v2/workflows"
+    GET_DAG_RESULTS_TEMPLATE = "/api/v2/workflow/%s/results"
 
     LIST_WORKFLOW_SAVED_OBJECTS_TEMPLATE = "/api/workflow/%s/objects"
     GET_TEST_INTEGRATION_TEMPLATE = "/api/integration/%s/test"
@@ -318,3 +320,56 @@ def test_endpoint_workflows_get(self):
                 for key in keys:
                     assert key in v2_workflow
                 assert v2_workflow["user_id"] == user_id
+
+    def test_endpoint_dag_results_get(self):
+        flow_id, n_runs = self.flows["flow_with_metrics_and_checks"]
+        resp = self.get_response(self.GET_DAG_RESULTS_TEMPLATE % flow_id).json()
+
+        assert len(resp) == n_runs
+
+        fields = ["id", "dag_id", "exec_state"]
+
+        def check_structure(resp):
+            for result in resp:
+                for field in fields:
+                    assert field in result
+                assert result["exec_state"]["status"] == "succeeded"
+                assert result["exec_state"]["failure_type"] == None
+                assert result["exec_state"]["error"] == None
+
+        check_structure(resp)
+
+        # Using the order parameter
+        flow_id, n_runs = self.flows["flow_with_failure"]
+        resp = self.get_response(
+            self.GET_DAG_RESULTS_TEMPLATE % flow_id,
+            additional_headers={
+                "order_by": "status",
+            },
+        ).json()
+        statuses = [result["exec_state"]["status"] for result in resp]
+        sorted_statuses = sorted(statuses, reverse=True)  # Descending order
+        assert statuses == sorted_statuses
+
+        # Using the limit parameter
+        resp = self.get_response(
+            self.GET_DAG_RESULTS_TEMPLATE % flow_id,
+            additional_headers={
+                "limit": "1",
+            },
+        ).json()
+        assert len(resp) == 1
+
+        # Using both the order and limit parameters
+        resp = self.get_response(
+            self.GET_DAG_RESULTS_TEMPLATE % flow_id,
+            additional_headers={
+                "order_by": "status",
+                "limit": "1",
+            },
+        ).json()
+
+        workflow_status = [result["exec_state"]["status"] for result in resp]
+        assert len(workflow_status) == 1
+        workflow_status = workflow_status[0]
+        assert workflow_status == sorted_statuses[0]

src/golang/cmd/server/handler/get_workflow.go

@@ -184,7 +184,7 @@ func (h *GetWorkflowHandler) Perform(ctx context.Context, interfaceArgs interfac
 		dags[dbDAG.ID] = constructedDAG
 	}
 
-	dagResults, err := h.DAGResultRepo.GetByWorkflow(ctx, args.workflowID, h.Database)
+	dagResults, err := h.DAGResultRepo.GetByWorkflow(ctx, args.workflowID, "", -1, h.Database)
 	if err != nil {
 		return emptyResp, http.StatusInternalServerError, errors.Wrap(err, "Unexpected error occurred when retrieving workflow.")
 	}

src/golang/cmd/server/handler/get_workflow_history.go

@@ -97,7 +97,7 @@ func (h *GetWorkflowHistoryHandler) Perform(ctx context.Context, interfaceArgs i
 		return nil, http.StatusBadRequest, errors.Wrap(err, fmt.Sprintf("Workflow %v does not exist.", args.workflowId))
 	}
 
-	results, err := h.DAGResultRepo.GetByWorkflow(ctx, args.workflowId, h.Database)
+	results, err := h.DAGResultRepo.GetByWorkflow(ctx, args.workflowId, "", -1, h.Database)
 	if err != nil && err != database.ErrNoRows() { // Don't return an error if there are just no rows.
 		return nil, http.StatusInternalServerError, errors.Wrap(err, "Unexpected error while retrieving workflow runs.")
 	}

src/golang/cmd/server/handler/v2/dag_results_get.go

@@ -23,17 +23,26 @@ import (
 // Method: GET
 // Params:
 //	`workflowId`: ID for `workflow` object
-//  `dagResultID`: ID for `workflow_dag_result` object
 // Request:
 //	Headers:
 //		`api-key`: user's API Key
+//  Parameters:
+//		`order_by`:
+//			Optional single field that the query should be ordered. Requires the table prefix.
+//		`limit`:
+//			Optional limit on the number of storage migrations returned. Defaults to all of them.
 // Response:
 //	Body:
 //		serialized `[]response.DAGResult`
 
 type dagResultsGetArgs struct {
 	*aq_context.AqContext
 	workflowID uuid.UUID
+
+	// A nil value means that the order is not set.
+	orderBy string
+	// A negative value for limit (eg. -1) means that the limit is not set.
+	limit int
 }
 
 type DAGResultsGetHandler struct {
@@ -60,9 +69,21 @@ func (h *DAGResultsGetHandler) Prepare(r *http.Request) (interface{}, int, error
 		return nil, http.StatusBadRequest, err
 	}
 
+	limit, err := (parser.LimitQueryParser{}).Parse(r)
+	if err != nil {
+		return nil, http.StatusBadRequest, err
+	}
+
+	orderBy, err := (parser.OrderByQueryParser{}).Parse(r, models.AllDAGResultCols())
+	if err != nil {
+		return nil, http.StatusBadRequest, err
+	}
+
 	return &dagResultsGetArgs{
 		AqContext:  aqContext,
 		workflowID: workflowID,
+		orderBy:    orderBy,
+		limit:      limit,
 	}, http.StatusOK, nil
 }
 
@@ -83,7 +104,7 @@ func (h *DAGResultsGetHandler) Perform(ctx context.Context, interfaceArgs interf
 		return nil, http.StatusBadRequest, errors.Wrap(err, "The organization does not own this workflow.")
 	}
 
-	dbDAGResults, err := h.DAGResultRepo.GetByWorkflow(ctx, args.workflowID, h.Database)
+	dbDAGResults, err := h.DAGResultRepo.GetByWorkflow(ctx, args.workflowID, args.orderBy, args.limit, h.Database)
 	if err != nil {
 		return nil, http.StatusInternalServerError, errors.Wrap(err, "Unexpected error reading dag results.")
 	}

src/golang/cmd/server/request/parser/query_limit.go

@@ -0,0 +1,25 @@
+package parser
+
+import (
+	"net/http"
+	"strconv"
+
+	"github.com/dropbox/godropbox/errors"
+)
+
+type LimitQueryParser struct{}
+
+func (LimitQueryParser) Parse(r *http.Request) (int, error) {
+	query := r.URL.Query()
+
+	var err error
+	limit := -1
+	if limitVal := query.Get("limit"); len(limitVal) > 0 {
+		limit, err = strconv.Atoi(limitVal)
+		if err != nil {
+			return -1, errors.Wrap(err, "Invalid limit header.")
+		}
+	}
+
+	return limit, nil
+}

src/golang/cmd/server/request/parser/query_order_by.go

@@ -0,0 +1,32 @@
+package parser
+
+import (
+	"net/http"
+
+	"github.com/dropbox/godropbox/errors"
+)
+
+type OrderByQueryParser struct{}
+
+func (OrderByQueryParser) Parse(r *http.Request, tableColumns []string) (string, error) {
+	query := r.URL.Query()
+
+	var err error
+	var orderBy string
+	if orderByVal := query.Get("order_by"); len(orderByVal) > 0 {
+		// Check is a field in table
+		isColumn := false
+		for _, column := range tableColumns {
+			if column == orderByVal {
+				isColumn = true
+				break
+			}
+		}
+		if !isColumn {
+			return "", errors.Wrap(err, "Invalid order_by value.")
+		}
+		orderBy = orderByVal
+	}
+
+	return orderBy, nil
+}

src/golang/lib/airflow/sync.go

@@ -121,7 +121,7 @@ func syncWorkflowDag(
 		return err
 	}
 
-	dagResults, err := dagResultRepo.GetByWorkflow(ctx, dag.WorkflowID, DB)
+	dagResults, err := dagResultRepo.GetByWorkflow(ctx, dag.WorkflowID, "", -1, DB)
 	if err != nil {
 		return err
 	}

src/golang/lib/engine/aq_engine.go

@@ -510,7 +510,7 @@ func (eng *aqEngine) DeleteWorkflow(
 		dagIDs = append(dagIDs, dag.ID)
 	}
 
-	dagResultsToDelete, err := eng.DAGResultRepo.GetByWorkflow(ctx, workflowObj.ID, txn)
+	dagResultsToDelete, err := eng.DAGResultRepo.GetByWorkflow(ctx, workflowObj.ID, "", -1, txn)
 	if err != nil {
 		return errors.Wrap(err, "Unexpected error occurred while retrieving workflow dag results.")
 	}

src/golang/lib/models/dag_result.go

@@ -32,21 +32,21 @@ type DAGResult struct {
 
 // DAGResultCols returns a comma-separated string of all DAGResult columns.
 func DAGResultCols() string {
-	return strings.Join(allDAGResultCols(), ",")
+	return strings.Join(AllDAGResultCols(), ",")
 }
 
 // DAGResultColsWithPrefix returns a comma-separated string of all
 // DAGResult columns prefixed by the table name.
 func DAGResultColsWithPrefix() string {
-	cols := allDAGResultCols()
+	cols := AllDAGResultCols()
 	for i, col := range cols {
 		cols[i] = fmt.Sprintf("%s.%s", DAGResultTable, col)
 	}
 
 	return strings.Join(cols, ",")
 }
 
-func allDAGResultCols() []string {
+func AllDAGResultCols() []string {
 	return []string{
 		DAGResultID,
 		DAGResultDagID,

src/golang/lib/repos/dag_result.go

@@ -25,7 +25,7 @@ type dagResultReader interface {
 	GetBatch(ctx context.Context, IDs []uuid.UUID, DB database.Database) ([]models.DAGResult, error)
 
 	// GetByWorkflow returns the DAGResults of all DAGs associated with the Workflow with workflowID.
-	GetByWorkflow(ctx context.Context, workflowID uuid.UUID, DB database.Database) ([]models.DAGResult, error)
+	GetByWorkflow(ctx context.Context, workflowID uuid.UUID, orderBy string, limit int, DB database.Database) ([]models.DAGResult, error)
 
 	// GetKOffsetByWorkflow returns the DAGResults of all DAGs associated with the Workflow with workflowID
 	// except for the last k DAGResults ordered by DAGResult.CreatedAt.

src/golang/lib/repos/sqlite/dag_result.go

@@ -3,6 +3,7 @@ package sqlite
 import (
 	"context"
 	"fmt"
+	"strconv"
 	"time"
 
 	"github.com/aqueducthq/aqueduct/lib/database"
@@ -52,13 +53,23 @@ func (*dagResultReader) GetBatch(ctx context.Context, IDs []uuid.UUID, DB databa
 	return getDAGResults(ctx, DB, query, args...)
 }
 
-func (*dagResultReader) GetByWorkflow(ctx context.Context, workflowID uuid.UUID, DB database.Database) ([]models.DAGResult, error) {
+func (*dagResultReader) GetByWorkflow(ctx context.Context, workflowID uuid.UUID, orderBy string, limit int, DB database.Database) ([]models.DAGResult, error) {
+	var orderByQuery string
+	if len(orderBy) > 0 {
+		orderByQuery = fmt.Sprintf(" ORDER BY %s.%s DESC", models.DAGResultTable, orderBy)
+	}
+
+	var limitQuery string
+	if limit >= 0 {
+		limitQuery = fmt.Sprintf(" LIMIT %s", strconv.Itoa(limit))
+	}
+
 	query := fmt.Sprintf(
 		`SELECT %s 
 		FROM workflow_dag_result, workflow_dag 
 		WHERE 
 			workflow_dag_result.workflow_dag_id = workflow_dag.id 
-			AND workflow_dag.workflow_id = $1;`,
+			AND workflow_dag.workflow_id = $1`+orderByQuery+limitQuery+`;`,
 		models.DAGResultColsWithPrefix(),
 	)
 	args := []interface{}{workflowID}

src/golang/lib/repos/tests/dag_result.go

@@ -38,7 +38,7 @@ func (ts *TestSuite) TestDAGResult_GetByWorkflow() {
 
 	expectedDAGResults := ts.seedDAGResultWithDAG(2, []uuid.UUID{dag.ID, dag.ID})
 
-	actualDAGResults, err := ts.dagResult.GetByWorkflow(ts.ctx, dag.WorkflowID, ts.DB)
+	actualDAGResults, err := ts.dagResult.GetByWorkflow(ts.ctx, dag.WorkflowID, "", -1, ts.DB)
 	require.Nil(ts.T(), err)
 	requireDeepEqualDAGResults(ts.T(), expectedDAGResults, actualDAGResults)
 }