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service: use reflect to generate insert sql
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| package service | ||
|
|
||
| import ( | ||
| "reflect" | ||
| "strings" | ||
|
|
||
| "github.com/fatih/camelcase" | ||
| gopluralize "github.com/gertd/go-pluralize" | ||
| ) | ||
|
|
||
| var pluralize = gopluralize.NewClient() | ||
|
|
||
| func tableNameOf(record interface{}) string { | ||
| rt := reflect.TypeOf(record) | ||
| if rt.Kind() == reflect.Ptr { | ||
| rt = rt.Elem() | ||
| } | ||
|
|
||
| typeName := rt.Name() | ||
| tableName := strings.Join(camelcase.Split(typeName), "_") | ||
| tableName = strings.ToLower(tableName) | ||
| return pluralize.Plural(tableName) | ||
| } | ||
|
|
||
| func placeholdersOf(record interface{}) []string { | ||
| rt := reflect.TypeOf(record) | ||
| if rt.Kind() == reflect.Ptr { | ||
| rt = rt.Elem() | ||
| } | ||
|
|
||
| if rt.Kind() != reflect.Struct { | ||
| return nil | ||
| } | ||
|
|
||
| var dbFields []string | ||
| for i := 0; i < rt.NumField(); i++ { | ||
| fieldType := rt.Field(i) | ||
| if tag, ok := fieldType.Tag.Lookup("db"); ok { | ||
| dbFields = append(dbFields, ":"+tag) | ||
| } | ||
| } | ||
|
|
||
| return dbFields | ||
| } | ||
|
|
||
| func fieldsNamesOf(record interface{}) []string { | ||
| rt := reflect.TypeOf(record) | ||
| if rt.Kind() == reflect.Ptr { | ||
| rt = rt.Elem() | ||
| } | ||
|
|
||
| if rt.Kind() != reflect.Struct { | ||
| return nil | ||
| } | ||
|
|
||
| var dbFields []string | ||
| for i := 0; i < rt.NumField(); i++ { | ||
| fieldType := rt.Field(i) | ||
| if tag, ok := fieldType.Tag.Lookup("db"); ok { | ||
| dbFields = append(dbFields, tag) | ||
| } | ||
| } | ||
|
|
||
| return dbFields | ||
| } | ||
|
|
||
| type ReflectCache struct { | ||
| tableNames map[string]string | ||
| fields map[string][]string | ||
| placeholders map[string][]string | ||
| insertSqls map[string]string | ||
| } | ||
|
|
||
| func NewReflectCache() *ReflectCache { | ||
| return &ReflectCache{ | ||
| tableNames: make(map[string]string), | ||
| fields: make(map[string][]string), | ||
| placeholders: make(map[string][]string), | ||
| insertSqls: make(map[string]string), | ||
| } | ||
| } | ||
|
|
||
| func (c *ReflectCache) InsertSqlOf(t interface{}) string { | ||
| rt := reflect.TypeOf(t) | ||
| if rt.Kind() == reflect.Ptr { | ||
| rt = rt.Elem() | ||
| } | ||
|
|
||
| typeName := rt.Name() | ||
| sql, ok := c.insertSqls[typeName] | ||
| if ok { | ||
| return sql | ||
| } | ||
|
|
||
| tableName := dbCache.TableNameOf(t) | ||
| fields := dbCache.FieldsOf(t) | ||
| placeholders := dbCache.PlaceholderOf(t) | ||
| fieldClause := strings.Join(fields, ", ") | ||
| placeholderClause := strings.Join(placeholders, ", ") | ||
|
|
||
| sql = `INSERT INTO ` + tableName + ` (` + fieldClause + `) VALUES (` + placeholderClause + `)` | ||
| c.insertSqls[typeName] = sql | ||
| return sql | ||
| } | ||
|
|
||
| func (c *ReflectCache) TableNameOf(t interface{}) string { | ||
| rt := reflect.TypeOf(t) | ||
| if rt.Kind() == reflect.Ptr { | ||
| rt = rt.Elem() | ||
| } | ||
|
|
||
| typeName := rt.Name() | ||
| tableName, ok := c.tableNames[typeName] | ||
| if ok { | ||
| return tableName | ||
| } | ||
|
|
||
| tableName = tableNameOf(t) | ||
| c.tableNames[typeName] = tableName | ||
| return tableName | ||
| } | ||
|
|
||
| func (c *ReflectCache) PlaceholderOf(t interface{}) []string { | ||
| rt := reflect.TypeOf(t) | ||
| if rt.Kind() == reflect.Ptr { | ||
| rt = rt.Elem() | ||
| } | ||
| typeName := rt.Name() | ||
| placeholders, ok := c.placeholders[typeName] | ||
| if ok { | ||
| return placeholders | ||
| } | ||
|
|
||
| placeholders = placeholdersOf(t) | ||
| c.placeholders[typeName] = placeholders | ||
| return placeholders | ||
| } | ||
|
|
||
| func (c *ReflectCache) FieldsOf(t interface{}) []string { | ||
| rt := reflect.TypeOf(t) | ||
| if rt.Kind() == reflect.Ptr { | ||
| rt = rt.Elem() | ||
| } | ||
|
|
||
| typeName := rt.Name() | ||
| fields, ok := c.fields[typeName] | ||
| if ok { | ||
| return fields | ||
| } | ||
|
|
||
| fields = fieldsNamesOf(t) | ||
| c.fields[typeName] = fields | ||
| return fields | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| package service | ||
|
|
||
| import ( | ||
| "reflect" | ||
| "testing" | ||
|
|
||
| "github.com/c9s/bbgo/pkg/types" | ||
| ) | ||
|
|
||
| func Test_tableNameOf(t *testing.T) { | ||
| type args struct { | ||
| record interface{} | ||
| } | ||
| tests := []struct { | ||
| name string | ||
| args args | ||
| want string | ||
| }{ | ||
| { | ||
| name: "MarginInterest", | ||
| args: args{record: &types.MarginInterest{}}, | ||
| want: "margin_interests", | ||
| }, | ||
| { | ||
| name: "MarginLoan", | ||
| args: args{record: &types.MarginLoan{}}, | ||
| want: "margin_loans", | ||
| }, | ||
| { | ||
| name: "MarginRepay", | ||
| args: args{record: &types.MarginRepay{}}, | ||
| want: "margin_repays", | ||
| }, | ||
| { | ||
| name: "MarginLiquidation", | ||
| args: args{record: &types.MarginLiquidation{}}, | ||
| want: "margin_liquidations", | ||
| }, | ||
| } | ||
| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| if got := tableNameOf(tt.args.record); got != tt.want { | ||
| t.Errorf("tableNameOf() = %v, want %v", got, tt.want) | ||
| } | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| func Test_fieldsNamesOf(t *testing.T) { | ||
| type args struct { | ||
| record interface{} | ||
| } | ||
| tests := []struct { | ||
| name string | ||
| args args | ||
| want []string | ||
| }{ | ||
| { | ||
| name: "MarginInterest", | ||
| args: args{record: &types.MarginInterest{}}, | ||
| want: []string{"asset", "principle", "interest", "interest_rate", "isolated_symbol", "time"}, | ||
| }, | ||
| } | ||
| for _, tt := range tests { | ||
| t.Run(tt.name, func(t *testing.T) { | ||
| if got := fieldsNamesOf(tt.args.record); !reflect.DeepEqual(got, tt.want) { | ||
| t.Errorf("fieldsNamesOf() = %v, want %v", got, tt.want) | ||
| } | ||
| }) | ||
| } | ||
| } |
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