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Ruby on Rails-5 postgresql-9.6 jsonb queries
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| http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query | |
| http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails | |
| #payload: [{"kind"=>"person"}] | |
| Segment.where("payload @> ?", [{kind: "person"}].to_json) | |
| #data: {"interest"=>["music", "movies", "programming"]} | |
| Segment.where("data @> ?", {"interest": ["music", "movies", "programming"]}.to_json) | |
| Segment.where("data #>> '{interest, 1}' = 'movies' ") | |
| Segment.where("jsonb_array_length(data->'interest') > 1") | |
| Segment.where("data->'interest' ? :value", value: "movies") | |
| Segment.where("data -> 'interest' ? :value", value: ['programming']) | |
| data: {"customers"=>[{:name=>"david"}]} | |
| Segment.where("data #> '{customers,0}' ->> 'name' = 'david' ") | |
| Segment.where("data @> ?", {"customers": [{"name": "david"}]}.to_json) | |
| Segment.where("data -> 'customers' @> '[{\"name\": \"david\"}]'") | |
| Segment.where(" data -> 'customers' @> ?", [{name: "david"}].to_json) | |
| #data: {"uid"=>"5", "blog"=>"recode"} | |
| Segment.where("data @> ?", {uid: '5'}.to_json) | |
| Segment.where("data ->> 'blog' = 'recode'") | |
| Segment.where("data ->> 'blog' = ?", "recode") | |
| Segment.where("data ? :key", :key => 'uid') | |
| Segment.where("data -> :key LIKE :value", :key => 'blog, :value => "%recode%") | |
| #tags: ["dele, jones", "solomon"] | |
| # get a single tag | |
| #Segment.where("'solomon' = ANY (tags)") | |
| # which segments are tagged with 'solomon' | |
| Segment.where('? = ANY (tags)', 'solomon') | |
| # which segments are not tagged with 'solomon' | |
| Segment.where('? != ALL (tags)', 'solomon') | |
| # or | |
| Segment.where('NOT (? = ANY (tags))', 'solomon') | |
| #multiple tags | |
| Segment.where("tags @> ARRAY[?]::varchar[]", ["dele, jones", "solomon"]) | |
| # tags with 3 items | |
| Segment.where("array_length(tags, 1) >= 3") | |
| # SUM (Thanks @skplunkerin) | |
| https://gist.github.com/mankind/1802dbb64fc24be33d434d593afd6221#gistcomment-2711098 | |
| `https://stackoverflow.com/a/39280048/1180523` | |
| ``` | |
| #data: [{"amount"=>12.0},{"amount"=>25.50},{"amount"=>17.99}] | |
| Segment.select("SUM((data ->> 'amount')::FLOAT) AS total_amount") | |
| ``` | |
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