在CRM中，类别（category）是比较复杂的，拥有不同的版本（aspect）来进行配置和管理。
下面展示了如何在代码中获取一个Order下面的所有已建的CAT_ID/CAT_GUID/CAT_Description
"获取抬头类别CAT
TYPES: ty_categories_tab_type TYPE TABLE OF REF TO if_crm_erms_catego_category.
DATA: lr_aspect TYPE REF TO if_crm_erms_catego_aspect,
lr_category TYPE REF TO if_crm_erms_catego_category.
DATA: lv_line TYPE i.
DATA: lr_categories TYPE REF TO data.
FIELD-SYMBOLS: <fs_categories> TYPE ty_categories_tab_type.
DATA: lw_cat_lang TYPE crmt_erms_cat_ca_lang,
lw_cat_lang_first TYPE crmt_erms_cat_ca_lang.
DATA: lv_cat_string TYPE string.
CREATE DATA lr_categories TYPE ty_categories_tab_type.
CALL METHOD cl_crm_ml_category_util=>get_categoryfirst "获取最底层的CAT
EXPORTING
iv_ref_guid = lv_guid
iv_ref_kind = 'A'
IMPORTING
er_aspect = lr_aspect
er_category = lr_category.
*
*
IF lr_aspect IS BOUND.
CALL METHOD lr_category->get_details
IMPORTING
ev_cat_lang = lw_cat_lang_first. "获取最底层的CAT ID
*
CALL METHOD cl_crm_ml_category_util=>get_cat_pars_all
EXPORTING
ir_aspect = lr_aspect
ir_category = lr_category
IMPORTING
er_categories = lr_categories.
ASSIGN lr_categories->* TO <fs_categories>.
LOOP AT <fs_categories> INTO lr_category.
CALL METHOD lr_category->get_details
IMPORTING
ev_cat_lang = lw_cat_lang.
lw_cat_desc-desc = lw_cat_lang-cat-cat_id. "获取其他层级的CAT ID
INSERT lw_cat_desc INTO TABLE lt_cat_desc.
CLEAR: lw_cat_desc, lw_cat_lang.
ENDLOOP.
lv_line = lines( lt_cat_desc ).
CASE lv_line.
WHEN 3.
lw_order_head-cat04 = lw_cat_lang_first-cat-cat_id.
READ TABLE lt_cat_desc INTO lw_cat_desc INDEX 1.
lw_order_head-cat03 = lw_cat_desc-desc.
CLEAR lw_cat_desc.
READ TABLE lt_cat_desc INTO lw_cat_desc INDEX 2.
lw_order_head-cat02 = lw_cat_desc-desc.
CLEAR lw_cat_desc.
READ TABLE lt_cat_desc INTO lw_cat_desc INDEX 3.
lw_order_head-cat01 = lw_cat_desc-desc.
CLEAR lw_cat_desc.
WHEN 2.
lw_order_head-cat03 = lw_cat_lang_first-cat-cat_id.
READ TABLE lt_cat_desc INTO lw_cat_desc INDEX 1.
lw_order_head-cat02 = lw_cat_desc-desc.
CLEAR lw_cat_desc.
READ TABLE lt_cat_desc INTO lw_cat_desc INDEX 2.
lw_order_head-cat01 = lw_cat_desc-desc.
CLEAR lw_cat_desc.
WHEN 1.
lw_order_head-cat02 = lw_cat_lang_first-cat-cat_id.
READ TABLE lt_cat_desc INTO lw_cat_desc INDEX 1.
lw_order_head-cat01 = lw_cat_desc-desc.
CLEAR lw_cat_desc.
WHEN 0.
lw_order_head-cat01 = lw_cat_lang_first-cat-cat_id.
ENDCASE.
CLEAR lt_cat_desc.
FREE: lr_aspect, lr_category, lr_categories.
ENDIF.
