Fix broken filtering through discriminator

discrimination.go

@@ -11,6 +11,10 @@ import (
 func (c *MongoClient) DiscriminatorCheckAndApplyToData(ctx context.Context, name string, data map[string]any) error {
 	cdef, ok := c.Registry[name]
 	if ok && cdef.Discriminator != nil {
+		if data == nil {
+			data = map[string]any{}
+		}
+
 		log.Printf("Discriminator found for %s; will use it", name)
 
 		// get from context
@@ -30,6 +34,10 @@ func (c *MongoClient) DiscriminatorCheckAndApplyToData(ctx context.Context, name
 func (c *MongoClient) DiscriminatorCheckAndApplyToFilter(ctx context.Context, name string, filter bson.M) error {
 	cdef, ok := c.Registry[name]
 	if ok && cdef.Discriminator != nil {
+		if filter == nil {
+			filter = bson.M{}
+		}
+
 		log.Printf("Discriminator found for %s; will use it", name)
 
 		// get from context

filter.go

@@ -3,13 +3,13 @@ package mongo
 import "log"
 
 type Query struct {
-	Filter map[string]any
+	Filter map[string]any `json:"filter"`
 }
 
 type Filter struct {
-	Name string
+	Name string `json:"name"`
-	Op string
+	Op string `json:"op"`
-	Value string
+	Value string `json:"value"`
 }
 
 func makeFilter(name string, value any) *Filter {
@@ -64,7 +64,7 @@ func Mongofy(q *Query) map[string]any {
 	}
 
 	if len(conditions) == 0 {
-		return nil
+		return map[string]any{}
 	}
 
 	if logic == "or" {

find.go

@@ -4,6 +4,7 @@ import (
 	"context"
 		
 	"go.mongodb.org/mongo-driver/v2/bson"
+	"git.gsuntres.com/general/commons"
 )
 
 // Find is used to fetch the first page of data.
@@ -89,6 +90,10 @@ func (c *MongoClient) FindOffset(ctx context.Context, database, name string, fil
 
 	finalLimit := max(limit, c.Limit)
 
+	if err := c.DiscriminatorCheckAndApplyToFilter(ctx, name, filter); err != nil {
+		return nil, err
+	}
+
 	f := Mongofy(&Query{
 		Filter: filter,
 	})
@@ -116,8 +121,8 @@ func (c *MongoClient) FindOffset(ctx context.Context, database, name string, fil
 
 	var totalValue any
 	if len(metadata) != 0 {
-		metadataRoot := metadata[0].(bson.M)
+		metadataRoot := metadata[0].(bson.D)
-		totalValue = metadataRoot["total"]
+		totalValue, _ = commons.BsonDGetAny(metadataRoot, "total")
 	}
 
 	var total int64

go.mod

@@ -3,7 +3,7 @@ module git.gsuntres.com/general/mongo
 go 1.25.0
 
 require (
-	git.gsuntres.com/general/commons v0.0.0-20260416141603-7a6c5b6c3c8c
+	git.gsuntres.com/general/commons v0.0.0-20260418004121-f52793a7641f
 	git.gsuntres.com/general/sys v0.0.0-20260329160429-49966ca31027
 	github.com/go-viper/mapstructure/v2 v2.5.0
 	github.com/google/go-cmp v0.7.0

go.sum

@@ -2,6 +2,8 @@ dario.cat/mergo v1.0.2 h1:85+piFYR1tMbRrLcDwR18y4UKJ3aH1Tbzi24VRW1TK8=
 dario.cat/mergo v1.0.2/go.mod h1:E/hbnu0NxMFBjpMIE34DRGLWqDy0g5FuKDhCb31ngxA=
 git.gsuntres.com/general/commons v0.0.0-20260416141603-7a6c5b6c3c8c h1:3jh+CfW0j4JQOa1tRN7UFWcbv5LxBRdHAeM8SoPDbJM=
 git.gsuntres.com/general/commons v0.0.0-20260416141603-7a6c5b6c3c8c/go.mod h1:ZawSPCI/Irjx7P83qJRcknKGuLLJ9c7hhP4OXgILnCY=
+git.gsuntres.com/general/commons v0.0.0-20260418004121-f52793a7641f h1:lSjhzGQBpON/Cc+wXZXcMrpgm0RQ+waipLoC/abmX7I=
+git.gsuntres.com/general/commons v0.0.0-20260418004121-f52793a7641f/go.mod h1:ZawSPCI/Irjx7P83qJRcknKGuLLJ9c7hhP4OXgILnCY=
 git.gsuntres.com/general/sys v0.0.0-20260329160429-49966ca31027 h1:4pmcjxEDM4rzv+iimQ7wTgCAQ1VnAoeGiHLuf6wC6Fw=
 git.gsuntres.com/general/sys v0.0.0-20260329160429-49966ca31027/go.mod h1:OVs7w4/tJO1GT7cLIeEsb90LuZqH2xYIVQODI5P1GJs=
 github.com/AdaLogics/go-fuzz-headers v0.0.0-20240806141605-e8a1dd7889d6 h1:He8afgbRMd7mFxO99hRNu+6tazq8nFF9lIwo9JFroBk=

main.go

@@ -232,6 +232,7 @@ type MongoStartProps struct {
 	MongoPass string
 	MongoDebugQuery bool
 	MongoDBPrefix string
+	AllowTruncatingDoubles bool
 }
 
 func Start(props *MongoStartProps) error {
@@ -262,7 +263,10 @@ func Start(props *MongoStartProps) error {
 			NilSliceAsEmpty:   true,
         	NilMapAsEmpty:     true,
 		}).
-		SetRegistry(GetCustomRegistry())
+		SetRegistry(GetCustomRegistry()).
+		SetBSONOptions(&options.BSONOptions{
+			AllowTruncatingDoubles: props.AllowTruncatingDoubles,
+		})
 
 	client.DebugQuery = props.MongoDebugQuery
 	if client.DebugQuery {