Add query support for ts_rank and ts_headline

psql/psql.go

@@ -23,9 +23,10 @@ func NewCompiler(schema *DBSchema, vars Variables) *Compiler {
 
 func (c *Compiler) Compile(w io.Writer, qc *qcode.QCode) error {
 	st := util.NewStack()
+	ti, _ := c.schema.GetTable(qc.Query.Select.Table)
 
 	st.Push(&selectBlockClose{nil, qc.Query.Select})
-	st.Push(&selectBlock{nil, qc.Query.Select, c})
+	st.Push(&selectBlock{nil, qc.Query.Select, ti, c})
 
 	fmt.Fprintf(w, `SELECT json_object_agg('%s', %s) FROM (`,
 		qc.Query.Select.FieldName, qc.Query.Select.Table)
@@ -43,10 +44,15 @@ func (c *Compiler) Compile(w io.Writer, qc *qcode.QCode) error {
 			v.render(w, c.schema, childCols, childIDs)
 
 			for i := range childIDs {
+				ti, err := c.schema.GetTable(v.sel.Table)
+				if err != nil {
+					continue
+				}
 				sub := v.sel.Joins[childIDs[i]]
+
 				st.Push(&joinClose{sub})
 				st.Push(&selectBlockClose{v.sel, sub})
-				st.Push(&selectBlock{v.sel, sub, c})
+				st.Push(&selectBlock{v.sel, sub, ti, c})
 				st.Push(&joinOpen{sub})
 			}
 		case *selectBlockClose:
@@ -103,6 +109,7 @@ func (c *Compiler) relationshipColumns(parent *qcode.Select) (
 type selectBlock struct {
 	parent *qcode.Select
 	sel    *qcode.Select
+	ti     *DBTableInfo
 	*Compiler
 }
 
@@ -267,24 +274,37 @@ func (v *selectBlock) renderBaseSelect(w io.Writer, schema *DBSchema, childCols
 	isFil := v.sel.Where != nil
 	isAgg := false
 
+	searchVal := findArgVal(v.sel, "search")
+
 	io.WriteString(w, " FROM (SELECT ")
 
 	for i, col := range v.sel.Cols {
 		cn := col.Name
-		fn := ""
+		_, isRealCol := v.schema.ColMap[TCKey{v.sel.Table, cn}]
 
-		if _, ok := v.schema.ColMap[TCKey{v.sel.Table, cn}]; !ok {
+		if !isRealCol {
+			switch {
+			case searchVal != nil && cn == "search_rank":
+				cn = v.ti.TSVCol
+				fmt.Fprintf(w, `ts_rank("%s"."%s", to_tsquery('%s')) AS %s`,
+					v.sel.Table, cn, searchVal.Val, col.Name)
+
+			case searchVal != nil && strings.HasPrefix(cn, "search_headline_"):
+				cn = cn[16:]
+				fmt.Fprintf(w, `ts_headline("%s"."%s", to_tsquery('%s')) AS %s`,
+					v.sel.Table, cn, searchVal.Val, col.Name)
+
+			default:
 				pl := funcPrefixLen(cn)
 				if pl == 0 {
-				continue
+					fmt.Fprintf(w, `'%s not defined' AS %s`, cn, col.Name)
-			}
+				} else {
 					isAgg = true
-			fn = cn[0 : pl-1]
+					fn := cn[0 : pl-1]
-			cn = cn[pl:]
+					cn := cn[pl:]
-		}
-
-		if len(fn) != 0 {
 					fmt.Fprintf(w, `%s("%s"."%s") AS %s`, fn, v.sel.Table, cn, col.Name)
+				}
+			}
 		} else {
 			groupBy = append(groupBy, i)
 			fmt.Fprintf(w, `"%s"."%s"`, v.sel.Table, cn)
@@ -396,32 +416,6 @@ func (v *selectBlock) renderRelationship(w io.Writer, schema *DBSchema) {
 }
 
 func (v *selectBlock) renderWhere(w io.Writer) error {
-	if v.sel.Where.Op == qcode.OpEqID {
-		t, err := v.schema.GetTable(v.sel.Table)
-		if err != nil {
-			return err
-		}
-		if len(t.PrimaryCol) == 0 {
-			return fmt.Errorf("no primary key column defined for %s", v.sel.Table)
-		}
-
-		fmt.Fprintf(w, `(("%s") = ('%s'))`, t.PrimaryCol, v.sel.Where.Val)
-		return nil
-	}
-
-	if v.sel.Where.Op == qcode.OpTsQuery {
-		t, err := v.schema.GetTable(v.sel.Table)
-		if err != nil {
-			return err
-		}
-		if len(t.TSVCol) == 0 {
-			return fmt.Errorf("no tsv column defined for %s", v.sel.Table)
-		}
-
-		fmt.Fprintf(w, `(("%s") @@ to_tsquery('%s'))`, t.TSVCol, v.sel.Where.Val)
-		return nil
-	}
-
 	st := util.NewStack()
 
 	if v.sel.Where != nil {
@@ -465,7 +459,7 @@ func (v *selectBlock) renderWhere(w io.Writer) error {
 
 			if val.NestedCol {
 				fmt.Fprintf(w, `(("%s") `, val.Col)
-			} else {
+			} else if len(val.Col) != 0 {
 				fmt.Fprintf(w, `(("%s"."%s") `, v.sel.Table, val.Col)
 			}
 			valExists := true
@@ -511,11 +505,25 @@ func (v *selectBlock) renderWhere(w io.Writer) error {
 				io.WriteString(w, `?&`)
 			case qcode.OpIsNull:
 				if strings.EqualFold(val.Val, "true") {
-					io.WriteString(w, `IS NULL`)
+					io.WriteString(w, `IS NULL)`)
 				} else {
-					io.WriteString(w, `IS NOT NULL`)
+					io.WriteString(w, `IS NOT NULL)`)
 				}
 				valExists = false
+			case qcode.OpEqID:
+				if len(v.ti.PrimaryCol) == 0 {
+					return fmt.Errorf("no primary key column defined for %s", v.sel.Table)
+				}
+				fmt.Fprintf(w, `(("%s") = ('%s'))`, v.ti.PrimaryCol, val.Val)
+				valExists = false
+			case qcode.OpTsQuery:
+				if len(v.ti.TSVCol) == 0 {
+					return fmt.Errorf("no tsv column defined for %s", v.sel.Table)
+				}
+
+				fmt.Fprintf(w, `(("%s") @@ to_tsquery('%s'))`, v.ti.TSVCol, val.Val)
+				valExists = false
+
 			default:
 				return fmt.Errorf("[Where] unexpected op code %d", val.Op)
 			}
@@ -526,9 +534,8 @@ func (v *selectBlock) renderWhere(w io.Writer) error {
 				} else {
 					renderVal(w, val, v.vars)
 				}
-			}
-
 				io.WriteString(w, `)`)
+			}
 
 		default:
 			return fmt.Errorf("[Where] unexpected value encountered %v", intf)
@@ -640,3 +647,12 @@ func funcPrefixLen(fn string) int {
 	}
 	return 0
 }
+
+func findArgVal(sel *qcode.Select, name string) *qcode.Node {
+	for i := range sel.Args {
+		if sel.Args[i].Name == name {
+			return sel.Args[i].Val
+		}
+	}
+	return nil
+}

psql/psql_test.go

@@ -69,7 +69,8 @@ func TestMain(m *testing.M) {
 			&DBColumn{ID: 4, Name: "price", Type: "numeric(7,2)", NotNull: false, PrimaryKey: false, Uniquekey: false, FKeyTable: "", FKeyColID: []int(nil)},
 			&DBColumn{ID: 5, Name: "user_id", Type: "bigint", NotNull: false, PrimaryKey: false, Uniquekey: false, FKeyTable: "users", FKeyColID: []int{1}},
 			&DBColumn{ID: 6, Name: "created_at", Type: "timestamp without time zone", NotNull: true, PrimaryKey: false, Uniquekey: false, FKeyTable: "", FKeyColID: []int(nil)},
-			&DBColumn{ID: 7, Name: "updated_at", Type: "timestamp without time zone", NotNull: true, PrimaryKey: false, Uniquekey: false, FKeyTable: "", FKeyColID: []int(nil)}},
+			&DBColumn{ID: 7, Name: "updated_at", Type: "timestamp without time zone", NotNull: true, PrimaryKey: false, Uniquekey: false, FKeyTable: "", FKeyColID: []int(nil)},
+			&DBColumn{ID: 8, Name: "tsv", Type: "tsvector", NotNull: false, PrimaryKey: false, Uniquekey: false, FKeyTable: "", FKeyColID: []int(nil)}},
 		[]*DBColumn{
 			&DBColumn{ID: 1, Name: "id", Type: "bigint", NotNull: true, PrimaryKey: true, Uniquekey: false, FKeyTable: "", FKeyColID: []int(nil)},
 			&DBColumn{ID: 2, Name: "customer_id", Type: "bigint", NotNull: false, PrimaryKey: false, Uniquekey: false, FKeyTable: "customers", FKeyColID: []int{1}},

qcode/qcode.go

@@ -25,6 +25,7 @@ type Column struct {
 
 type Select struct {
 	ID         int16
+	Args       []*Arg
 	AsList     bool
 	Table      string
 	Singular   string
@@ -332,12 +333,16 @@ func (com *Compiler) compileQuery(op *Operation) (*Query, error) {
 
 func (com *Compiler) compileArgs(sel *Select, args []*Arg) error {
 	var err error
+	ad := make(map[string]struct{})
 
 	for i := range args {
 		if args[i] == nil {
 			return fmt.Errorf("[Args] unexpected nil argument found")
 		}
 		an := strings.ToLower(args[i].Name)
+		if _, ok := ad[an]; ok {
+			continue
+		}
 
 		switch an {
 		case "id":
@@ -345,9 +350,7 @@ func (com *Compiler) compileArgs(sel *Select, args []*Arg) error {
 				err = com.compileArgID(sel, args[i])
 			}
 		case "search":
-			if sel.ID == int16(0) {
 			err = com.compileArgSearch(sel, args[i])
-			}
 		case "where":
 			err = com.compileArgWhere(sel, args[i])
 		case "orderby", "order_by", "order":
@@ -363,6 +366,8 @@ func (com *Compiler) compileArgs(sel *Select, args []*Arg) error {
 		if err != nil {
 			return err
 		}
+
+		ad[an] = struct{}{}
 	}
 
 	return nil
@@ -446,16 +451,14 @@ func (com *Compiler) compileArgID(sel *Select, arg *Arg) error {
 }
 
 func (com *Compiler) compileArgSearch(sel *Select, arg *Arg) error {
-	if sel.Where != nil && sel.Where.Op == OpTsQuery {
-		return nil
-	}
-
 	ex := &Exp{
 		Op:   OpTsQuery,
 		Type: ValStr,
 		Val:  arg.Val.Val,
 	}
 
+	sel.Args = append(sel.Args, arg)
+
 	if sel.Where != nil {
 		sel.Where = &Exp{Op: OpAnd, Children: []*Exp{ex, sel.Where}}
 	} else {

serv/serv.go

@@ -16,7 +16,7 @@ import (
 	"github.com/spf13/viper"
 )
 
-//go:generate esc -o static.go -prefix ../web/build -private -pkg serv ../web/build
+//go:generate esc -o static.go -ignore \\.DS_Store -prefix ../web/build -private -pkg serv ../web/build
 
 const (
 	authFailBlockAlways = iota + 1