{"id":427,"date":"2019-08-23T14:18:42","date_gmt":"2019-08-23T12:18:42","guid":{"rendered":"https:\/\/kszyh.kisim.eu.org\/?p=427"},"modified":"2019-08-23T14:18:42","modified_gmt":"2019-08-23T12:18:42","slug":"join-mongodb-strings-array","status":"publish","type":"post","link":"https:\/\/kszyh.kisim.eu.org\/?p=427","title":{"rendered":"Join  MongoDB strings array"},"content":{"rendered":"<pre class=\"lang:js decode:true \">db.getCollection(\"abstracts\").aggregate([\r\n    {\r\n        \"$addFields\": {\r\n            \"keywordsStr\": {\r\n                \"$reduce\": {\r\n                    \"input\": \"$keywords\",\r\n                    \"initialValue\": \"\",\r\n                    \"in\": {\r\n                        '$concat': [\r\n                            '$$value',\r\n                            {\r\n                                '$cond': [\r\n                                    { '$eq': ['$$value', ''] },\r\n                                    '',\r\n                                    ', '\r\n                                ]\r\n                            },\r\n                            '$$this']\r\n                    }\r\n                }\r\n            }\r\n        },\r\n    },\r\n])\r\n<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>db.getCollection(&#8222;abstracts&#8221;).aggregate([ { &#8222;$addFields&#8221;: { &#8222;keywordsStr&#8221;: { &#8222;$reduce&#8221;: { &#8222;input&#8221;: &#8222;$keywords&#8221;, &#8222;initialValue&#8221;: &#8222;&#8221;, &#8222;in&#8221;: { '$concat&#8217;: [ '$$value&#8217;, { '$cond&#8217;: [ { '$eq&#8217;: [&#8217;$$value&#8217;, &#8221;] }, &#8221;, &#8217;, &#8217; ] }, '$$this&#8217;] } } } }, }, ]) &nbsp;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[92,97],"tags":[],"class_list":["post-427","post","type-post","status-publish","format-standard","hentry","category-java-script","category-mongodb"],"_links":{"self":[{"href":"https:\/\/kszyh.kisim.eu.org\/index.php?rest_route=\/wp\/v2\/posts\/427","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kszyh.kisim.eu.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kszyh.kisim.eu.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kszyh.kisim.eu.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kszyh.kisim.eu.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=427"}],"version-history":[{"count":1,"href":"https:\/\/kszyh.kisim.eu.org\/index.php?rest_route=\/wp\/v2\/posts\/427\/revisions"}],"predecessor-version":[{"id":428,"href":"https:\/\/kszyh.kisim.eu.org\/index.php?rest_route=\/wp\/v2\/posts\/427\/revisions\/428"}],"wp:attachment":[{"href":"https:\/\/kszyh.kisim.eu.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kszyh.kisim.eu.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kszyh.kisim.eu.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}