Parse Indexes
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Jinzhu
parent
62dcd7896a
commit
ad419855e9
116
schema/index.go
Normal file
116
schema/index.go
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@ -0,0 +1,116 @@
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package schema
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import (
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"strconv"
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"strings"
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)
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type Index struct {
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Name string
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Class string // UNIQUE | FULLTEXT | SPATIAL
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Fields []IndexOption
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}
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type IndexOption struct {
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*Field
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Expression string
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Sort string // DESC, ASC
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Collate string
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Length int
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Type string // btree, hash, gist, spgist, gin, and brin
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Where string
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Comment string
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}
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// ParseIndexes parse schema indexes
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func (schema *Schema) ParseIndexes() map[string]Index {
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var indexes = map[string]Index{}
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for _, field := range schema.FieldsByDBName {
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if field.TagSettings["INDEX"] != "" || field.TagSettings["UNIQUE_INDEX"] != "" {
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for _, index := range parseFieldIndexes(field) {
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idx := indexes[index.Name]
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idx.Name = index.Name
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if idx.Class == "" {
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idx.Class = index.Class
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}
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idx.Fields = append(idx.Fields, index.Fields...)
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indexes[index.Name] = idx
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}
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}
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}
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return indexes
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}
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func parseFieldIndexes(field *Field) (indexes []Index) {
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for _, value := range strings.Split(field.Tag.Get("gorm"), ";") {
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if value != "" {
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v := strings.Split(value, ":")
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k := strings.TrimSpace(strings.ToUpper(v[0]))
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if k == "INDEX" || k == "UNIQUE_INDEX" {
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var (
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name string
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tag = strings.Join(v[1:], ":")
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settings = map[string]string{}
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)
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names := strings.Split(tag, ",")
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for i := 0; i < len(names); i++ {
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if len(names[i]) > 0 {
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j := i
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for {
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if names[j][len(names[j])-1] == '\\' {
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i++
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names[j] = names[j][0:len(names[j])-1] + names[i]
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names[i] = ""
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} else {
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break
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}
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}
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}
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if i == 0 {
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name = names[0]
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}
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values := strings.Split(names[i], ":")
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k := strings.TrimSpace(strings.ToUpper(values[0]))
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if len(values) >= 2 {
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settings[k] = strings.Join(values[1:], ":")
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} else if k != "" {
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settings[k] = k
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}
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}
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if name == "" {
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name = field.Schema.namer.IndexName(field.Schema.Table, field.Name)
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}
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length, _ := strconv.Atoi(settings["LENGTH"])
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if (k == "UNIQUE_INDEX") || settings["UNIQUE"] != "" {
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settings["CLASS"] = "UNIQUE"
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}
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indexes = append(indexes, Index{
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Name: name,
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Class: settings["CLASS"],
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Fields: []IndexOption{{
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Field: field,
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Expression: settings["EXPRESSION"],
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Sort: settings["SORT"],
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Collate: settings["COLLATE"],
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Type: settings["TYPE"],
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Length: length,
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Where: settings["WHERE"],
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Comment: settings["COMMENT"],
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}},
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})
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}
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}
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}
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return
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}
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96
schema/index_test.go
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96
schema/index_test.go
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@ -0,0 +1,96 @@
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package schema_test
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import (
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"reflect"
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"sync"
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"testing"
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"github.com/jinzhu/gorm/schema"
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)
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type UserIndex struct {
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Name string `gorm:"index"`
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Name2 string `gorm:"index:idx_name,unique"`
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Name3 string `gorm:"index:,sort:desc,collate:utf8,type:btree,length:10,where:name3 != 'jinzhu'"`
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Name4 string `gorm:"unique_index"`
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Name5 int64 `gorm:"index:,class:FULLTEXT,comment:hello \\, world,where:age > 10"`
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Name6 int64 `gorm:"index:profile,comment:hello \\, world,where:age > 10"`
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Age int64 `gorm:"index:profile,expression:(age+10)"`
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}
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func TestParseIndex(t *testing.T) {
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user, err := schema.Parse(&UserIndex{}, &sync.Map{}, schema.NamingStrategy{})
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if err != nil {
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t.Fatalf("failed to parse user index index, got error %v", err)
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}
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results := map[string]schema.Index{
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"idx_user_indices_name": {
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Name: "idx_user_indices_name",
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Fields: []schema.IndexOption{{}},
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},
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"idx_name": {
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Name: "idx_name",
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Class: "UNIQUE",
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Fields: []schema.IndexOption{{}},
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},
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"idx_user_indices_name3": {
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Name: "idx_user_indices_name3",
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Fields: []schema.IndexOption{{
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Sort: "desc",
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Collate: "utf8",
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Length: 10,
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Type: "btree",
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Where: "name3 != 'jinzhu'",
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}},
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},
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"idx_user_indices_name4": {
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Name: "idx_user_indices_name4",
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Class: "UNIQUE",
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Fields: []schema.IndexOption{{}},
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},
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"idx_user_indices_name5": {
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Name: "idx_user_indices_name5",
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Class: "FULLTEXT",
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Fields: []schema.IndexOption{{
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Comment: "hello , world",
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Where: "age > 10",
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}},
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},
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"profile": {
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Name: "profile",
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Fields: []schema.IndexOption{{
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Comment: "hello , world",
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Where: "age > 10",
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}, {
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Expression: "(age+10)",
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}},
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},
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}
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indices := user.ParseIndexes()
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for k, result := range results {
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v, ok := indices[k]
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if !ok {
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t.Errorf("Failed to found index %v from parsed indices %+v", k, indices)
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}
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if result.Name != v.Name {
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t.Errorf("index %v name should equal, expects %v, got %v", k, result.Name, v.Name)
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}
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if result.Class != v.Class {
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t.Errorf("index %v Class should equal, expects %v, got %v", k, result.Class, v.Class)
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}
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for idx, ef := range result.Fields {
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rf := v.Fields[idx]
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for _, name := range []string{"Expression", "Sort", "Collate", "Length", "Type", "Where"} {
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if reflect.ValueOf(ef).FieldByName(name).Interface() != reflect.ValueOf(rf).FieldByName(name).Interface() {
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t.Errorf("index %v field #%v's %v should equal, expects %v, got %v", k, idx+1, name, reflect.ValueOf(ef).FieldByName(name).Interface(), reflect.ValueOf(rf).FieldByName(name).Interface())
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}
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}
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}
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}
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}
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@ -1,9 +1,11 @@
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package schema
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import (
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"crypto/sha1"
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"fmt"
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"strings"
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"sync"
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"unicode/utf8"
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"github.com/jinzhu/inflection"
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)
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@ -12,6 +14,7 @@ import (
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type Namer interface {
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TableName(table string) string
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ColumnName(table, column string) string
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IndexName(table, column string) string
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JoinTableName(table string) string
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}
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@ -30,8 +33,21 @@ func (ns NamingStrategy) TableName(str string) string {
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}
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// ColumnName convert string to column name
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func (ns NamingStrategy) ColumnName(table, str string) string {
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return toDBName(str)
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func (ns NamingStrategy) ColumnName(table, column string) string {
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return toDBName(column)
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}
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func (ns NamingStrategy) IndexName(table, column string) string {
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idxName := fmt.Sprintf("idx_%v_%v", table, toDBName(column))
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if utf8.RuneCountInString(idxName) > 64 {
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h := sha1.New()
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h.Write([]byte(idxName))
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bs := h.Sum(nil)
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idxName = fmt.Sprintf("idx%v%v", table, column)[0:56] + string(bs)[:8]
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}
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return idxName
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}
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// JoinTableName convert string to join table name
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