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dialect/sql/sqlgraph: add tests for nodes count

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This commit is contained in:
Ariel Mashraki
2019-12-12 17:22:36 +02:00
parent 26ccecdf6d
commit fb4e1b6234
2 changed files with 54 additions and 27 deletions
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16
dialect/sql/graph.go
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@@ -443,13 +443,20 @@ type QuerySpec struct {
Assign func(...interface{}) error
}
// QueryNodes query the nodes in the graph and scan them to the given values.
// QueryNodes query the nodes in the graph query and scans them to the given values.
func QueryNodes(ctx context.Context, drv dialect.Driver, spec *QuerySpec) error {
builder := Dialect(drv.Dialect())
qr := &query{graph: graph{builder: builder}, QuerySpec: spec}
return qr.nodes(ctx, drv)
}
// CountNodes counts the nodes in the given graph query.
func CountNodes(ctx context.Context, drv dialect.Driver, spec *QuerySpec) (int, error) {
builder := Dialect(drv.Dialect())
qr := &query{graph: graph{builder: builder}, QuerySpec: spec}
return qr.count(ctx, drv)
}
type query struct {
graph
*QuerySpec
@@ -476,7 +483,12 @@ func (q *query) nodes(ctx context.Context, drv dialect.Driver) error {
func (q *query) count(ctx context.Context, drv dialect.Driver) (int, error) {
rows := &Rows{}
query, args := q.selector().Count(q.Node.ID.Column).Query()
selector := q.selector().Count(q.Node.ID.Column)
if q.Unique {
selector.distinct = false
selector.Count(Distinct(q.Node.ID.Column))
}
query, args := selector.Query()
if err := drv.Query(ctx, query, args, rows); err != nil {
return 0, err
}