Startseite Beiträge getaggt mit "et_entityset"

Schlagwort: et_entityset

[ABAP] OData: $top und $skip – Pagingfunktionen implementieren 

* https://blogs.sap.com/2017/12/06/display-countfilterorderbyinlinecounttop-and-skip-operations-using-odata-services/
* für SAPUI5-Elemente muss zugehöriges EntitySet in der SEGW auf "Paginierbar" gestellt sein

METHOD xyz_get_entityset.

  ...

* $top und $skip auslesen
    DATA(lv_top) = io_tech_request_context->get_top( ).
    DATA(lv_skip) = io_tech_request_context->get_skip( ).
    DATA(lv_maxrows) = 0.

* lv_maxrows setzen
    IF lv_top > 0.
      lv_maxrows = lv_top + lv_skip.
    ENDIF.

* Daten holen
    SELECT * FROM abc INTO TABLE @et_entityset UP TO @lv_maxrows ROWS.

* überflüssige Daten löschen
    IF NOT lv_skip IS INITIAL.
      DELETE et_entityset TO lv_skip.
    ENDIF.

  ...

ENDMETHOD.

[ABAP] OData: $orderby implementieren

Variante 1

* https://blogs.sap.com/2013/09/03/sap-gw-implement-a-better-orderby-for-cust-ext-class/
* http://www.techippo.com/2016/08/sorting-query-options-orderby-sap-odata-service.html
* http://www.saplearners.com/orderby-query-option-in-sap-netweaver-gateway/
* https://blogs.sap.com/2017/12/06/display-countfilterorderbyinlinecounttop-and-skip-operations-using-odata-services/

METHOD xyz_get_entityset.

  ...

  DATA(it_orderby) = io_tech_request_context->get_orderby( ).

  IF line_exists( it_orderby[ property = 'MATNR' ] ).
    DATA(lv_orderby) = it_orderby[ property = 'MATNR' ].

    CASE lv_orderby-order.
      WHEN 'asc'.
        SORT: et_entityset BY name ASCENDING.
      WHEN 'desc'.
        SORT: et_entityset BY name DESCENDING.
    ENDCASE.
  ENDIF.

  ...

ENDMETHOD.

Variante 2

METHOD xyz_get_entityset.

  ...

  DATA(it_orderby) = io_tech_request_context->get_orderby( ).

  READ TABLE it_orderby INTO DATA(ls_orderby) INDEX 1.
  IF sy-subrc = 0.
* generische Order-Property verwenden, wenn z.B. nur ein Sortierkriterium vorhanden
* (z.B. beim Anklicken von Tabellenfeldern)
    CASE ls_orderby-order.
      WHEN 'asc'.
        SORT: et_entityset BY (ls_orderby-property) ASCENDING.
      WHEN 'desc'.
        SORT: et_entityset BY (ls_orderby-property) DESCENDING.
    ENDCASE.
  ENDIF.

  ...

ENDMETHOD.

[ABAP] OData: $inlinecount implementieren 

* https://blogs.sap.com/2017/12/06/display-countfilterorderbyinlinecounttop-and-skip-operations-using-odata-services/
* $inlinecount=allpages
* $inlinecount=none

METHOD xyz_get_entityset.
  
  ...

  IF abap_true = io_tech_request_context->has_inlinecount( ).
    es_response_context-inlinecount = lines( et_entityset ).
  ELSE.
    CLEAR: es_response_context-inlinecount.
  ENDIF.

ENDMETHOD.

[ABAP] OData: Navigation/Assoziation zwischen Entitätsmengen

Transaktion SEGW

  • Neues Projekt: ZFLIGHT_ASSOC
  • Entitätstyp:
    • Carrier aus DDIC Struktur “SCARR”
      • Carrid (Key)
      • Carrname
      • Url
  • Flights aus DDIC Struktur “SPFLI”
    • Carrid (Key)
    • Connid (Key)
    • Countryfr
    • Cityfrom
    • Airpfrom
  • Entitätsmenge:
    • CarrierSet
    • FlightsSet
  • Serviceklassen generieren
  • Service registrieren

Serviceimplementierung: GetEntity(Read)

* URL/SERVICENAME/CarrierSet('AA')
METHOD carrierset_get_entity.

  io_tech_request_context->get_converted_keys( IMPORTING es_key_values = er_entity ).
  
  IF NOT er_entity-carrid IS INITIAL.
    SELECT SINGLE * FROM scarr INTO CORRESPONDING FIELDS OF @er_entity WHERE carrid = @er_entity-carrid.
  ENDIF.

ENDMETHOD.
    
* URL/SERVICENAME/FlightsSet(Carrid='AA',Connid='64')
METHOD flightsset_get_entity.

  io_tech_request_context->get_converted_keys( IMPORTING es_key_values = er_entity ).

  IF NOT er_entity-carrid IS INITIAL AND NOT er_entity-connid IS INITIAL..
    SELECT SINGLE * FROM spfli INTO CORRESPONDING FIELDS OF @er_entity
      WHERE carrid = @er_entity-carrid
        AND connid = @er_entity-connid.
  
    IF sy-subrc <> 0.
      CLEAR: er_entity.
    ENDIF.
  ENDIF.
  
ENDMETHOD.

Serviceimplementierung: GetEntitySet(Query)

* URL/SERVICENAME/CarrierSet
METHOD carrierset_get_entityset.

  SELECT * FROM scarr INTO CORRESPONDING FIELDS OF TABLE @et_entityset.

ENDMETHOD.
    
* URL/SERVICENAME/FlightsSet
METHOD flightsset_get_entityset.

  SELECT * FROM spfli INTO CORRESPONDING FIELDS OF TABLE @et_entityset.

ENDMETHOD.

Assoziation anlegen

  • Rechtsklick auf “Assoziationen” -> Anlegen
  • Name: CarrierToFlights
  • Principal-Entität: Name “Carrier”
  • Untergeordnete Entität: Name “Flights”
  • Kardinalität: Carrier 1 : Flights n
  • Navigationsproperty anlegen: ToFlights
  • Bezug: Carrid – Carrid

Code anpassen

* URL/SERVICENAME/CarrierSet('AA')/ToFlights?$format=json
METHOD flightsset_get_entityset.

  * Typen und Konstanten sind in der MPC definiert
  DATA: lv_flights TYPE zcl_zflight_assoc2_mpc=>ts_flights.

  DATA(lv_source_entity_type_name) = io_tech_request_context->get_source_entity_type_name( ).

  CASE lv_source_entity_type_name.
  * Typen und Konstanten sind in der MPC definiert
    WHEN zcl_zflight_assoc2_mpc=>gc_carrier.
      io_tech_request_context->get_converted_source_keys( IMPORTING es_key_values = lv_flights ).
  ENDCASE.

  IF NOT lv_flights IS INITIAL.
    SELECT * FROM spfli INTO CORRESPONDING FIELDS OF TABLE @et_entityset WHERE carrid = @lv_flights-carrid.
  ELSE.
    SELECT * FROM spfli INTO CORRESPONDING FIELDS OF TABLE @et_entityset.
  ENDIF.

ENDMETHOD.

Weiterführende Infos: Link

[ABAP] OData: $filter implementieren 

* für SAPUI5-Elemente muss zugehöriges EntitySet in der SEGW auf "Filterbar" gestellt sein

* Groß-/Kleinschreibung beachten
* Verknüpfungen: "or" und "and" klein geschrieben
* Datumswerte mit VarDate=datetime'yyyy-mm-ddThh:mm:ss' konvertieren
* Umlaute konvertieren

* Filter-Options sind: eq, ne, le, lt, ge, gt, substringof, startswith, endswith

* Abfrage-URL
URL/SERVICENAME/ItemCollection?$filter=Col1 eq 'Horst'
URL/SERVICENAME/ItemCollection?$filter=Col1 eq 'Horst' and Col2 eq 'Schmidt'
URL/SERVICENAME/ItemCollection?$filter=Col1 eq 'Horst'&$format=json

* Methode get_entityset implementieren
METHOD xyz_get_entityset.

* Variante 1 (Tabelle mit Filter-Properties + Options + RANGE)

* Achtung: Filterbedingungen, die mit 'or' verknüpft sind, werden aufgrund eines Fehlers vom MPC
*          nicht korrekt geparst -> get_filter_select_options liefert leere Tabelle
*
* Lösung 1: die or-Teile müssen korrekt in Klammern gesetzt werden
*           https://.../SERVICENAME/DataSet?$filter=(Col1 gt '1000' or Col1 lt '9999') and Col2 eq '10'
* Lösung 2: Filterbedingungen mit 'and' verknüpfen

* Filterkriterien holen
  DATA(it_filter_so) = io_tech_request_context->get_filter( )->get_filter_select_options( ).

  DATA(so_matnr) = VALUE /iwbep/t_cod_select_options( ).

  IF line_exists( it_filter_so[ property = 'MATNR' ] ).
    so_matnr = it_filter_so[ property = 'MATNR' ]-select_options.
  ENDIF.

  SELECT * FROM mara WHERE matnr IN so_matnr.

  ...

* Variante 2 (Tabelle mit Filter-Properties + Options auslesen)
  DATA: lv_matnr TYPE matnr
  DATA(it_filter_so) = io_tech_request_context->get_filter( )->get_filter_select_options( ).
  
  IF NOT it_filter_so IS INITIAL.
    TRY.
        lv_matnr = it_filter_so[ property = 'MATNR' ]-select_options[ 1 ]-low.

        ...
      CATCH cx_root.
    ENDTRY.
  ENDIF.
  
* Variante 3 (Filter-String)
  DATA(lv_filter_string) = io_tech_request_context->get_filter( )->get_filter_string( ).
  
  ...

* Variante 4 (String für WHERE-Clause)
  DATA(lv_osql_where_clause) = io_tech_request_context->get_osql_where_clause( ).

  ...

  SELECT * FROM xy INTO TABLE @it_itab
    WHERE (lv_osql_where_clause).

  ...
  
ENDMETHOD.

Links