feat: add Go backend
This commit is contained in:
richjohnrambo
@@ -0,0 +1,305 @@
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// Package views
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// @Link https://github.com/bufanyun/hotgo
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// @Copyright Copyright (c) 2023 HotGo CLI
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// @Author Ms <133814250@qq.com>
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// @License https://github.com/bufanyun/hotgo/blob/master/LICENSE
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package views
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import (
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"context"
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"fmt"
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"strings"
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"hotgo/internal/consts"
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"hotgo/internal/library/hggen/internal/cmd/gendao"
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"hotgo/internal/model/input/sysin"
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"github.com/gogf/gf/v2/database/gdb"
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"github.com/gogf/gf/v2/frame/g"
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"github.com/gogf/gf/v2/text/gregex"
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"github.com/gogf/gf/v2/text/gstr"
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"github.com/gogf/gf/v2/util/gconv"
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)
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// DoTableColumns 获取指定表生成字段列表
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func DoTableColumns(ctx context.Context, in *sysin.GenCodesColumnListInp, config gendao.CGenDaoInput) (fields []*sysin.GenCodesColumnListModel, err error) {
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var (
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sql string
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conf = g.DB(in.Name).GetConfig()
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)
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// 根据数据库类型使用不同的SQL
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if conf.Type == consts.DBPgsql {
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// PostgreSQL: 使用pg_catalog查询列详细信息
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sql = `
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SELECT
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a.attnum as id,
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a.attname as name,
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COALESCE(col_description(a.attrelid, a.attnum), '') as dc,
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t.typname as dataType,
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CASE
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WHEN a.atttypmod > 0 THEN t.typname || '(' || (a.atttypmod - 4) || ')'
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ELSE t.typname
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END as sqlType,
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CASE
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WHEN a.atttypmod > 0 THEN a.atttypmod - 4
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ELSE NULL
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END as length,
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CASE WHEN a.attnotnull THEN 'NO' ELSE 'YES' END as isAllowNull,
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pg_get_expr(ad.adbin, ad.adrelid) as defaultValue,
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CASE
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WHEN pk.contype = 'p' THEN 'PRI'
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WHEN uk.contype = 'u' THEN 'UNI'
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ELSE ''
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END as "index",
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CASE
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WHEN ad.adbin IS NOT NULL AND ad.adbin LIKE '%nextval%' THEN 'auto_increment'
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ELSE ''
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END as extra
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FROM pg_attribute a
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JOIN pg_class c ON a.attrelid = c.oid
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JOIN pg_namespace n ON c.relnamespace = n.oid
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JOIN pg_type t ON a.atttypid = t.oid
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LEFT JOIN pg_attrdef ad ON a.attrelid = ad.adrelid AND a.attnum = ad.adnum
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LEFT JOIN pg_constraint pk ON pk.conrelid = c.oid AND pk.contype = 'p' AND a.attnum = ANY(pk.conkey)
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LEFT JOIN pg_constraint uk ON uk.conrelid = c.oid AND uk.contype = 'u' AND a.attnum = ANY(uk.conkey)
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WHERE n.nspname = 'public'
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AND c.relname = '` + in.Table + `'
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AND a.attnum > 0
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AND NOT a.attisdropped
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ORDER BY a.attnum`
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} else {
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// MySQL: 使用information_schema.COLUMNS
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sql = fmt.Sprintf("SELECT ORDINAL_POSITION as id, COLUMN_NAME as name, COLUMN_COMMENT as dc, DATA_TYPE as dataType, COLUMN_TYPE as sqlType, CHARACTER_MAXIMUM_LENGTH as length, IS_NULLABLE as isAllowNull, COLUMN_DEFAULT as defaultValue, COLUMN_KEY as `index`, EXTRA as extra FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = '%s' AND TABLE_NAME = '%s' ORDER BY id ASC", conf.Name, in.Table)
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}
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err = g.DB(in.Name).Ctx(ctx).Raw(sql).Scan(&fields)
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if err != nil {
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return nil, err
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}
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if len(fields) == 0 {
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return
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}
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for _, field := range fields {
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if in.IsLink == 1 {
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CustomLinkAttributes(ctx, in.Alias, field, config)
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} else {
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CustomAttributes(ctx, field, config)
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}
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}
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return
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}
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// CustomLinkAttributes 可自定义关联表的字段属性
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func CustomLinkAttributes(ctx context.Context, alias string, field *sysin.GenCodesColumnListModel, in gendao.CGenDaoInput) {
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field.GoName, field.GoType, field.TsName, field.TsType = GenGotype(ctx, field, in)
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field.GoName = gstr.UcFirst(alias + field.GoName)
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field.TsName = gstr.LcFirst(field.GoName)
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setDefaultQueryWhere(field)
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setDefaultValue(field)
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}
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// CustomAttributes 可自定义的字段属性
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func CustomAttributes(ctx context.Context, field *sysin.GenCodesColumnListModel, in gendao.CGenDaoInput) {
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field.GoName, field.GoType, field.TsName, field.TsType = GenGotype(ctx, field, in)
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setDefault(field)
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}
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// GenGotype 生成字段的go类型
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func GenGotype(ctx context.Context, field *sysin.GenCodesColumnListModel, in gendao.CGenDaoInput) (goName, typeName, tsName string, tsType string) {
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var err error
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tsName = getJsonTagFromCase(field.Name, in.JsonCase)
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goName = gstr.CaseCamel(field.Name)
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typeName, err = CheckLocalTypeForField(ctx, field.DataType, nil)
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if err != nil {
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panic(err)
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}
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switch gdb.LocalType(typeName) {
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case gdb.LocalTypeDate, gdb.LocalTypeDatetime:
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if in.StdTime {
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typeName = "time.Time"
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} else {
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typeName = "*gtime.Time"
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}
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case gdb.LocalTypeInt64Bytes:
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typeName = "int64"
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case gdb.LocalTypeUint64Bytes:
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typeName = "uint64"
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// Special type handle.
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case gdb.LocalTypeJson, gdb.LocalTypeJsonb:
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if in.GJsonSupport {
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typeName = "*gjson.Json"
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} else {
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typeName = "string"
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}
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}
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tsType = ShiftMap[typeName]
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return
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}
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// CheckLocalTypeForField checks and returns corresponding type for given db type.
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func CheckLocalTypeForField(ctx context.Context, fieldType string, fieldValue interface{}) (string, error) {
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var (
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typeName string
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typePattern string
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)
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match, _ := gregex.MatchString(`(.+?)\((.+)\)`, fieldType)
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if len(match) == 3 {
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typeName = gstr.Trim(match[1])
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typePattern = gstr.Trim(match[2])
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} else {
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typeName = gstr.Split(fieldType, " ")[0]
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}
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typeName = strings.ToLower(typeName)
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switch typeName {
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case
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"binary",
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"varbinary",
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"blob",
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"tinyblob",
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"mediumblob",
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"longblob":
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return string(gdb.LocalTypeBytes), nil
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case
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"int",
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"tinyint",
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"small_int",
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"smallint",
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"medium_int",
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"mediumint",
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"serial":
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if gstr.ContainsI(fieldType, "unsigned") {
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return string(gdb.LocalTypeUint), nil
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}
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return string(gdb.LocalTypeInt), nil
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case
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"big_int",
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"bigint",
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"bigserial":
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if gstr.ContainsI(fieldType, "unsigned") {
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return string(gdb.LocalTypeUint64), nil
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}
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return string(gdb.LocalTypeInt64), nil
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case
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"real":
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return string(gdb.LocalTypeFloat32), nil
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case
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"float",
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"double",
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"decimal",
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"money",
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"numeric",
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"smallmoney":
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return string(gdb.LocalTypeFloat64), nil
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case
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"bit":
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// It is suggested using bit(1) as boolean.
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if typePattern == "1" {
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return string(gdb.LocalTypeBool), nil
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}
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s := gconv.String(fieldValue)
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// mssql is true|false string.
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if strings.EqualFold(s, "true") || strings.EqualFold(s, "false") {
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return string(gdb.LocalTypeBool), nil
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}
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if gstr.ContainsI(fieldType, "unsigned") {
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return string(gdb.LocalTypeUint64Bytes), nil
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}
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return string(gdb.LocalTypeInt64Bytes), nil
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case
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"bool":
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return string(gdb.LocalTypeBool), nil
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case
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"date":
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return string(gdb.LocalTypeDate), nil
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case
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"datetime",
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"timestamp",
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"timestamptz":
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return string(gdb.LocalTypeDatetime), nil
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case
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"json":
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return string(gdb.LocalTypeJson), nil
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case
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"jsonb":
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return string(gdb.LocalTypeJsonb), nil
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default:
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// Auto-detect field type, using key match.
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switch {
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case strings.Contains(typeName, "text") || strings.Contains(typeName, "char") || strings.Contains(typeName, "character"):
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return string(gdb.LocalTypeString), nil
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case strings.Contains(typeName, "float") || strings.Contains(typeName, "double") || strings.Contains(typeName, "numeric"):
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return string(gdb.LocalTypeFloat64), nil
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case strings.Contains(typeName, "bool"):
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return string(gdb.LocalTypeBool), nil
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case strings.Contains(typeName, "binary") || strings.Contains(typeName, "blob"):
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return string(gdb.LocalTypeBytes), nil
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case strings.Contains(typeName, "int"):
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if gstr.ContainsI(fieldType, "unsigned") {
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return string(gdb.LocalTypeUint), nil
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}
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return string(gdb.LocalTypeInt), nil
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case strings.Contains(typeName, "time"):
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return string(gdb.LocalTypeDatetime), nil
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case strings.Contains(typeName, "date"):
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return string(gdb.LocalTypeDatetime), nil
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default:
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return string(gdb.LocalTypeString), nil
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}
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}
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}
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// getJsonTagFromCase call gstr.Case* function to convert the s to specified case.
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func getJsonTagFromCase(str, caseStr string) string {
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switch gstr.ToLower(caseStr) {
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case gstr.ToLower("Camel"):
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return gstr.CaseCamel(str)
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case gstr.ToLower("CamelLower"):
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return gstr.CaseCamelLower(str)
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case gstr.ToLower("Kebab"):
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return gstr.CaseKebab(str)
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case gstr.ToLower("KebabScreaming"):
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return gstr.CaseKebabScreaming(str)
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case gstr.ToLower("Snake"):
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return gstr.CaseSnake(str)
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case gstr.ToLower("SnakeFirstUpper"):
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return gstr.CaseSnakeFirstUpper(str)
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case gstr.ToLower("SnakeScreaming"):
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return gstr.CaseSnakeScreaming(str)
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}
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return str
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}
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