Re: Re: How to design static master data in ddd
"Paul Rayner [email protected] [domaindrivendesign]" <[email protected]> Tue, 16 Feb 2016 19:48:09 -0700
| Newsgroups | gmane.comp.programming.domain-driven-design |
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| Message-ID | <CAKKp0qigahRf6eJadoQGy-icn-6efbigPU8jwCA3626tyOqiQQ@mail.gmail.com> |
--001a11c2e55a17f4e0052bee4af5 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable I'd make it a value object and move on to more interesting domain questions. Aggregates have identity and lifecycle, value objects don't - why overcomplicate things here? Be biased towards modeling things with no conceptual identity in your context as value objects and reduce complexity. See p. 19 of https://domainlanguage.com/ddd/patterns/DDD_Reference_2011-01-31.pdf for more info. Paul. On Sat, Feb 6, 2016 at 5:46 PM, [email protected] [domaindrivendesign] <[email protected]> wrote: > > > The "DDD way" is no cookie-cutter. Remember the subtitle "Tackling > complexity in the heart of software". Spot the heart and put your efforts > there, be pragmatic on the outskirts. Be prepared to change things once > you've learned more about the problem you are dealing with. > > Thomas > >=20 > --001a11c2e55a17f4e0052bee4af5 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <head> <style type=3D"text/css"> <!-- /* start of attachment style */ .ygrp-photo-title{ clear: both; font-size: smaller; height: 15px; overflow: hidden; text-align: center; width: 75px; } div.ygrp-photo{ background-position: center; background-repeat: no-repeat; background-color: white; border: 1px solid black; height: 62px; width: 62px; } div.photo-title=20 a, div.photo-title a:active, div.photo-title a:hover, div.photo-title a:visited { text-decoration: none;=20 } div.attach-table div.attach-row { clear: both; } div.attach-table div.attach-row div { float: left; /* margin: 2px;*/ } p { clear: both; padding: 15px 0 3px 0; overflow: hidden; } div.ygrp-file { width: 30px; valign: middle; } div.attach-table div.attach-row div div a { text-decoration: none; } div.attach-table div.attach-row div div span { font-weight: normal; } div.ygrp-file-title { font-weight: bold; } /* end of attachment style */ --> </style> </head> <html> <head> <style type=3D"text/css"> <!-- #ygrp-mkp { border: 1px solid #d8d8d8; font-family: Arial; margin: 10px 0; padding: 0 10px; } #ygrp-mkp hr { border: 1px solid #d8d8d8; } #ygrp-mkp #hd { color: #628c2a; font-size: 85%; font-weight: 700; line-height: 122%; margin: 10px 0; } #ygrp-mkp #ads { margin-bottom: 10px; } #ygrp-mkp .ad { padding: 0 0; } #ygrp-mkp .ad p { margin: 0; } #ygrp-mkp .ad a { color: #0000ff; text-decoration: none; } --> </style> </head> <body> <!-- |**|begin egp html banner|**| --> <br><br> <!-- |**|end egp html banner|**| --> <div dir=3D"ltr">I'd make it a value object and move on to more interes= ting domain questions. Aggregates have identity and lifecycle, value object= s don't - why overcomplicate things here? Be biased towards modeling th= ings with no conceptual identity in your context as value objects and reduc= e complexity. See p. 19 of=C2=A0<a href=3D"https://domainlanguage.com/ddd/p= atterns/DDD_Reference_2011-01-31.pdf">https://domainlanguage.com/ddd/patter= ns/DDD_Reference_2011-01-31.pdf</a> for more info.<div class=3D"gmail_extra= "><br clear=3D"all"><div><div class=3D"gmail_signature">Paul.<div><br></div= ></div></div><div class=3D"gmail_quote">On Sat, Feb 6, 2016 at 5:46 PM, <a = href=3D"mailto:[email protected]">[email protected]</a> [domain= drivendesign] <span dir=3D"ltr"><<a href=3D"mailto:domaindrivendesign@ya= hoogroups.com" target=3D"_blank">[email protected]</a>>= </span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px= 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-= left-style:solid;padding-left:1ex"> <u></u> =20 <div style=3D"background-color:rgb(255,255,255)"> <span>=C2=A0</span> <div> <div> <div> =20=20=20=20=20=20 =20=20=20=20=20=20 <p>The "DDD way" is no cookie-cutter. Remember the subtitle= "Tackling complexity in the heart of software". Spot the heart a= nd put your efforts there, be pragmatic on the outskirts. Be prepared to ch= ange things once you've learned more about the problem you are dealing = with.=C2=A0</p><div><br></div><div>Thomas</div><p></p> </div> =20=20=20=20=20 =20=20=20=20 <div style=3D"color:rgb(255,255,255);min-height:0px"></div> </div> =20=20 </blockquote></div><br></div></div> <!-- |**|begin egp html banner|**| --> <br> <br> <!-- |**|end egp html banner|**| --> <div width=3D"1" style=3D"color: white; clear: both;"/>__._,_.___</div> =20=20=20=20=20=20 =20=20 =20=20=20=20 <div id=3D"fromDMARC" style=3D"clear:both; margin-top: 10px;"> <hr style=3D"height:2px ; border-width:0; color:#E3E3E3; backgroun= d-color:#E3E3E3;"> Posted by: Paul Rayner <[email protected]> <hr= style=3D"height:2px ; border-width:0; color:#E3E3E3; background-color:#E3E= 3E3;"> </div> <!-- Start Recommendations --> <!-- End Recommendations --> <!-- |**|begin egp html banner|**| --> <img src=3D"http://geo.yahoo.com/serv?s=3D97476590/grpId=3D8116923/grpspI= d=3D1705007181/msgId=3D24738/stime=3D1455677331" width=3D"1" height=3D"1"> = <br> <!-- |**|end egp html banner|**| --> =20=20 <!-- |**|begin egp html banner|**| --> <br> =20=20=20 =20=20=20=20=20 =20 <!-- |**|begin egp html banner|**| --> <div id=3D"ygrp-vital" style=3D"background-color: #f2f2f2; font-fam= ily: Verdana; font-size: 10px; margin-bottom: 10px; padding: 10px;"> <span id=3D"vithd" style=3D"font-weight: bold; color: #333; text-tr= ansform: uppercase; "><a href=3D"https://groups.yahoo.com/neo/groups/domain= drivendesign/info;_ylc=3DX3oDMTJlZDJqdmxuBF9TAzk3MzU5NzE0BGdycElkAzgxMTY5Mj= MEZ3Jwc3BJZAMxNzA1MDA3MTgxBHNlYwN2dGwEc2xrA3ZnaHAEc3RpbWUDMTQ1NTY3NzMzMQ--"= style=3D"text-decoration: none;">Visit Your Group</a></span> <ul style=3D"list-style-type: none; margin: 0; padding: 0; display: in= line;"> <li style=3D"border-right: 1px solid #000; font-weight: 700; di= splay: inline; padding: 0 5px; margin-left: 0;"> <span class=3D"cat"><a href=3D"https://groups.yahoo.com/neo/groups/do= maindrivendesign/members/all;_ylc=3DX3oDMTJmam42bm83BF9TAzk3MzU5NzE0BGdycEl= kAzgxMTY5MjMEZ3Jwc3BJZAMxNzA1MDA3MTgxBHNlYwN2dGwEc2xrA3ZtYnJzBHN0aW1lAzE0NT= U2NzczMzE-" style=3D"text-decoration: none;">New Members</a></span> <span class=3D"ct" style=3D"color: #ff7900;">3</span> </li> </ul> </div> <div id=3D"ft" style=3D"font-family: Arial; font-size: 11px; margin-top: 5p= x; padding: 0 2px 0 0; clear: both;"> <a href=3D"https://groups.yahoo.com/neo;_ylc=3DX3oDMTJkNTVpaHJxBF9TAzk3ND= c2NTkwBGdycElkAzgxMTY5MjMEZ3Jwc3BJZAMxNzA1MDA3MTgxBHNlYwNmdHIEc2xrA2dmcARzd= GltZQMxNDU1Njc3MzMx" style=3D"float: left;"><img src=3D"http://l.yimg.com/r= u/static/images/yg/img/email/new_logo/logo-groups-137x15.png" height=3D"15"= width=3D"137" alt=3D"Yahoo! 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