86 lines
2.0 KiB
Go
86 lines
2.0 KiB
Go
package logic
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import (
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"context"
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"errors"
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"godemo/category/category"
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"godemo/category/internal/model"
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"godemo/category/internal/svc"
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"github.com/zeromicro/go-zero/core/logx"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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)
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type GetCategoryLogic struct {
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ctx context.Context
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svcCtx *svc.ServiceContext
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logx.Logger
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}
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func NewGetCategoryLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetCategoryLogic {
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return &GetCategoryLogic{
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ctx: ctx,
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svcCtx: svcCtx,
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Logger: logx.WithContext(ctx),
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}
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}
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func (l *GetCategoryLogic) GetCategory(in *category.GetCategoryRequest) (*category.CategoryInfoResponse, error) {
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// 1. 参数校验
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if in.Id == "" {
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return nil, status.Error(codes.InvalidArgument, "分类ID不能为空")
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}
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// 2. 查询数据库
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categoryData, err := l.svcCtx.CategoryModel.FindOne(l.ctx, in.Id)
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if err != nil {
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if errors.Is(err, model.ErrNotFound) {
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l.Logger.Errorf("分类不存在, ID: %s", in.Id)
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return nil, status.Error(codes.NotFound, "分类不存在")
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}
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l.Logger.Errorf("数据库查询失败: %v", err)
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return nil, status.Error(codes.Internal, "内部错误")
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}
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// 3. 转换响应格式
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return l.convertToResponse(categoryData), nil
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}
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func (l *GetCategoryLogic) convertToResponse(c *model.Categories) *category.CategoryInfoResponse {
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// 处理可能为空的字段
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var alias, parentID, description string
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if c.Alias.Valid {
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alias = c.Alias.String
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}
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if c.ParentId.Valid {
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parentID = c.ParentId.String
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}
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if c.Description.Valid {
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description = c.Description.String
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}
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// 处理时间戳
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var updatedAt int64
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if c.UpdatedAt.Valid {
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updatedAt = c.UpdatedAt.Time.Unix()
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} else {
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updatedAt = c.CreatedAt.Unix() // 如果未更新过，使用创建时间
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}
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return &category.CategoryInfoResponse{
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Category: &category.CategoryInfo{
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Id: c.Id,
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SystemId: c.SystemId,
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Name: c.Name,
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Alias: alias,
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ParentId: parentID,
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Description: description,
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CreatedAt: c.CreatedAt.Unix(),
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UpdatedAt: updatedAt,
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},
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}
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}
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