add a new Append method to Model, handle misc errors, unexport some funcs + methods

.idea/codeStyles/codeStyleConfig.xml

@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="PREFERRED_PROJECT_CODE_STYLE" value="Default" />
+  </state>
+</component>

.idea/inspectionProfiles/profiles_settings.xml

@@ -0,0 +1,7 @@
+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="PROJECT_PROFILE" value="Default" />
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>

.idea/material_theme_project_new.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="MaterialThemeProjectNewConfig">
+    <option name="metadata">
+      <MTProjectMetadataState>
+        <option name="migrated" value="true" />
+        <option name="pristineConfig" value="false" />
+        <option name="userId" value="1fe2f249:191aa6d861d:-7ffe" />
+      </MTProjectMetadataState>
+    </option>
+    <option name="titleBarState">
+      <MTProjectTitleBarConfigState>
+        <option name="overrideColor" value="false" />
+      </MTProjectTitleBarConfigState>
+    </option>
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="excludedPrintfFunctions.xml">
+    <option name="excludedDescriptors">
+      <set>
+        <PrintfFuncDescriptorState>
+          <option name="importPath" value="fmt" />
+          <option name="name" value="Errorf" />
+        </PrintfFuncDescriptorState>
+      </set>
+    </option>
+    <option name="excludedNames">
+      <set>
+        <option value="Errorf" />
+      </set>
+    </option>
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/orm.iml" filepath="$PROJECT_DIR$/.idea/orm.iml" />
+    </modules>
+  </component>
+</project>

.idea/orm.iml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+	"nuxt.isNuxtApp": false
+}

indexes.go

@@ -79,12 +79,12 @@ func scanIndex(src string) []InternalIndex {
 		switch tok {
 		case token.LBRACE:
 			if lb {
-				goto panik
+				goto _panik
 			}
 			lb = true
 		case token.RBRACE:
 			if !lb || len(p.Fields) == 0 {
-				goto panik
+				goto _panik
 			}
 			lb = false
 		case token.IDENT:
@@ -100,36 +100,36 @@ func scanIndex(src string) []InternalIndex {
 			p.appendOption(lit)
 		case token.PERIOD:
 			if p.getSticky() {
-				goto panik
+				goto _panik
 			}
 			p.setSticky(true)
 			p.updateLastField()
 		case token.COMMA:
 		case token.COLON:
 			if lb {
-				goto panik
+				goto _panik
 			}
 		case token.SEMICOLON:
 			if lb {
-				goto panik
+				goto _panik
 			}
 			parsed = append(parsed, *p)
 			p = &InternalIndex{}
 		case token.EOF:
 			if lb {
-				goto panik
+				goto _panik
 			}
 			return parsed
 		default:
-			goto panik
+			goto _panik
 		}
 	}
 
-panik:
+_panik:
 	panic("parsing error in index expression!")
 }
 
-func BuildIndex(i InternalIndex) *mongo.IndexModel {
+func buildIndex(i InternalIndex) *mongo.IndexModel {
 	idx := &mongo.IndexModel{
 		Keys: i.Fields,
 	}

model.go

@@ -19,20 +19,22 @@ type Model struct {
 	Created time.Time `bson:"createdAt" json:"createdAt"`
 	// Modified time. updated/added automatically.
 	Modified time.Time `bson:"updatedAt" json:"updatedAt"`
-	typeName string    `bson:"-" json:"-"`
-	self     any       `bson:"-" json:"-"`
+	typeName string    `bson:"-"`
+	self     any       `bson:"-"`
 	exists   bool      `bson:"-"`
 }
 
-// HasID is a simple interface that you must implement.
-// This allows for more flexibility if your ID isn't an
-// ObjectID (e.g., int, uint, string...).
+// HasID is a simple interface that you must implement
+// in your models, using a pointer receiver.
+// This allows for more flexibility in cases where
+// your ID isn't an ObjectID (e.g., int, uint, string...).
 //
 // and yes, those darn ugly ObjectIDs are supported :)
 type HasID interface {
 	Id() any
 	SetId(id any)
 }
+type HasIDSlice []HasID
 
 type IModel interface {
 	Find(query interface{}, opts ...*options.FindOptions) (*mongo.Cursor, error)
@@ -46,12 +48,21 @@ type IModel interface {
 	Save() error
 	serializeToStore() primitive.M
 	setTypeName(str string)
+	getExists() bool
+	setExists(n bool)
 }
 
 func (m *Model) setTypeName(str string) {
 	m.typeName = str
 }
 
+func (m *Model) getExists() bool {
+	return m.exists
+}
+func (m *Model) setExists(n bool) {
+	m.exists = n
+}
+
 func (m *Model) getColl() *mongo.Collection {
 	_, ri, ok := ModelRegistry.HasByName(m.typeName)
 	if !ok {
@@ -61,11 +72,11 @@ func (m *Model) getColl() *mongo.Collection {
 }
 
 func (m *Model) getIdxs() []*mongo.IndexModel {
-	mi := []*mongo.IndexModel{}
+	mi := make([]*mongo.IndexModel, 0)
 	if mpi := m.getParsedIdxs(); mpi != nil {
 		for _, v := range mpi {
 			for _, i := range v {
-				mi = append(mi, BuildIndex(i))
+				mi = append(mi, buildIndex(i))
 			}
 		}
 		return mi
@@ -116,15 +127,17 @@ func (m *Model) FindAll(query interface{}, opts ...*options.FindOptions) (*Query
 	return qq, err
 }
 
-func (m *Model) FindPaged(query interface{}, page int64, perPage int64, options ...*options.FindOptions) (*Query, error) {
+func (m *Model) FindPaged(query interface{}, page int64, perPage int64, opts ...*options.FindOptions) (*Query, error) {
 	skipAmt := perPage * (page - 1)
 	if skipAmt < 0 {
 		skipAmt = 0
 	}
-	if len(options) > 0 {
-		options[0].SetSkip(skipAmt).SetLimit(perPage)
+	if len(opts) > 0 {
+		opts[0].SetSkip(skipAmt).SetLimit(perPage)
+	} else {
+		opts = append(opts, options.Find().SetSkip(skipAmt).SetLimit(perPage))
 	}
-	q, err := m.FindAll(query, options...)
+	q, err := m.FindAll(query, opts...)
 	q.Op = OP_FIND_PAGED
 	return q, err
 }
@@ -133,12 +146,6 @@ func (m *Model) FindByID(id interface{}) (*Query, error) {
 	return m.FindOne(bson.D{{"_id", id}})
 }
 
-// 1  2  3  4  5  6  7  8  9  10 11  12  13  14  15  16  17  18  19  20  21  22  23  24  25
-// 0  1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24
-
-// ^                          ^
-//                               ^                                   ^
-
 func (m *Model) FindOne(query interface{}, options ...*options.FindOneOptions) (*Query, error) {
 	coll := m.getColl()
 	rip := coll.FindOne(context.TODO(), query, options...)
@@ -163,6 +170,61 @@ func (m *Model) FindOne(query interface{}, options ...*options.FindOneOptions) (
 	return qq, err
 }
 
+func (m *Model) DeleteOne() error {
+	c := m.getColl()
+	if valueOf(m.self).Kind() == reflect.Slice {
+	}
+	id, ok := m.self.(HasID)
+	if !ok {
+		id2, ok2 := m.self.(HasIDSlice)
+		if !ok2 {
+			return fmt.Errorf("model '%s' is not registered", m.typeName)
+		}
+		_, err := c.DeleteOne(context.TODO(), bson.M{"_id": id2[0].Id()})
+		return err
+	}
+	_, err := c.DeleteOne(context.TODO(), bson.M{"_id": id.Id()})
+	return err
+}
+
+// Append appends one or more items to `field`.
+// will error if this Model contains a reference
+// to multiple documents, or if `field` is not a
+// slice.
+func (m *Model) Append(field string, a ...interface{}) error {
+	rv := reflect.ValueOf(m.self)
+	ref := rv
+	rt := reflect.TypeOf(m.self)
+	if ref.Kind() == reflect.Pointer {
+		ref = ref.Elem()
+		rt = rt.Elem()
+	}
+	if ref.Kind() == reflect.Slice {
+		return fmt.Errorf("Cannot append to multiple documents!")
+	}
+	if ref.Kind() != reflect.Struct {
+		return fmt.Errorf("Current object is not a struct!")
+	}
+	_, ofv, err := getNested(field, ref)
+	if err != nil {
+		return err
+	}
+	oofv := makeSettable(*ofv, (*ofv).Interface())
+	fv := oofv
+	if fv.Kind() == reflect.Pointer {
+		fv = fv.Elem()
+	}
+	if fv.Kind() != reflect.Slice {
+		return fmt.Errorf("Current object is not a slice!")
+	}
+
+	for _, b := range a {
+		va := reflect.ValueOf(b)
+		fv.Set(reflect.Append(fv, va))
+	}
+	return nil
+}
+
 func (m *Model) Save() error {
 	var err error
 	c := m.getColl()
@@ -175,8 +237,8 @@ func (m *Model) Save() error {
 	}
 	var asHasId = vp.Interface().(HasID)
 	(asHasId).Id()
-	isNew := reflect.ValueOf(asHasId.Id()).IsZero() || !m.exists
-	if isNew {
+	isNew := reflect.ValueOf(asHasId.Id()).IsZero() && !m.exists
+	if isNew || !m.exists {
 		m.Created = now
 	}
 	m.Modified = now
@@ -187,7 +249,7 @@ func (m *Model) Save() error {
 			return err
 		}
 	}
-	if isNew {
+	if isNew || !m.exists {
 		nid := getLastInColl(c.Name(), asHasId.Id())
 		switch pnid := nid.(type) {
 		case uint:
@@ -214,8 +276,10 @@ func (m *Model) Save() error {
 		}
 
 		m.self = asHasId
-		c.InsertOne(context.TODO(), m.serializeToStore())
-		m.exists = true
+		_, err = c.InsertOne(context.TODO(), m.serializeToStore())
+		if err == nil {
+			m.exists = true
+		}
 	} else {
 		_, err = c.ReplaceOne(context.TODO(), bson.D{{Key: "_id", Value: m.self.(HasID).Id()}}, m.serializeToStore())
 	}
@@ -245,7 +309,7 @@ func serializeIDs(input interface{}) bson.M {
 	for i := 0; i < mv.NumField(); i++ {
 		fv := mv.Field(i)
 		ft := mt.Field(i)
-		var dr reflect.Value = fv
+		var dr = fv
 		tag, err := structtag.Parse(string(mt.Field(i).Tag))
 		panik(err)
 		bbson, err := tag.Get("bson")
@@ -331,8 +395,8 @@ func serializeIDSlice(input []interface{}) bson.A {
 	return a
 }
 
-// Create creates a new instance of a given model.
-// returns a pointer to the newly created model.
+// Create creates a new instance of a given model
+// and returns a pointer to it.
 func Create(d any) any {
 	var n string
 	var ri *InternalModel

model_test.go

@@ -41,7 +41,6 @@ func TestPopulate(t *testing.T) {
 	err := bandDoc.Save()
 	assert.Equal(t, nil, err)
 	storyDoc.Author = author
-	err = author.Save()
 	assert.Equal(t, nil, err)
 	err = storyDoc.Save()
 	assert.Equal(t, nil, err)
@@ -107,3 +106,23 @@ func TestModel_PopulateMulti(t *testing.T) {
 	query.Populate("Author", "Chapters.Bands").Exec(&final)
 	assert.Greater(t, len(final), 0)
 }
+
+func TestModel_Append(t *testing.T) {
+	initTest()
+	bmodel := Create(band{}).(*band)
+	query, err := bmodel.FindByID(int64(1))
+	assert.Equal(t, nil, err)
+	fin := &band{}
+	query.Exec(fin)
+	assert.Greater(t, fin.ID, int64(0))
+
+	err = bmodel.Append("Characters", "Robert Trujillo")
+	assert.Equal(t, nil, err)
+	err = bmodel.Save()
+	assert.Equal(t, nil, err)
+	fin = &band{}
+	query, _ = bmodel.FindByID(int64(1))
+	query.Exec(fin)
+	assert.Greater(t, len(fin.Characters), 4)
+
+}

query.go

@@ -478,5 +478,6 @@ func (q *Query) Exec(result interface{}) {
 		panic("Exec() has already been called!")
 	}
 	reflect.ValueOf(result).Elem().Set(reflect.ValueOf(q.doc).Elem())
+	q.Model.self = q.doc
 	q.done = true
 }

util.go

@@ -1,6 +1,10 @@
 package orm
 
-import "reflect"
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
 
 func panik(err error) {
 	if err != nil {
@@ -68,3 +72,32 @@ func coerceInt(input reflect.Value, dst reflect.Value) interface{} {
 	}
 	return nil
 }
+
+func getNested(field string, value reflect.Value) (*reflect.Type, *reflect.Value, error) {
+	if strings.HasPrefix(field, ".") || strings.HasSuffix(field, ".") {
+		return nil, nil, fmt.Errorf("Malformed field name %s passed", field)
+	}
+	dots := strings.Split(field, ".")
+	if value.Kind() != reflect.Struct {
+		return nil, nil, fmt.Errorf("This value is not a struct!")
+	}
+	ref := value
+	if ref.Kind() == reflect.Pointer {
+		ref = ref.Elem()
+	}
+	fv := ref.FieldByName(dots[0])
+	ft := fv.Type()
+	if len(dots) > 1 {
+		return getNested(strings.Join(dots[1:], "."), fv)
+	} else {
+		return &ft, &fv, nil
+	}
+}
+func makeSettable(rval reflect.Value, value interface{}) reflect.Value {
+	if !rval.CanSet() {
+		nv := reflect.New(rval.Type())
+		nv.Elem().Set(reflect.ValueOf(value))
+		return nv
+	}
+	return rval
+}