保存空白Excel單元格到Rails Postgres數據庫

我設法讓Roo Gem工作，以便我可以導入Excel文件並將其保存到我的應用程序的數據庫中。這已經成功了幾次，但似乎在某些行中包含空格的電子表格中，它會引發錯誤。我的代碼如下：保存空白Excel單元格到Rails Postgres數據庫

需要「袋鼠」

xlsx = Roo::Excelx.new(File.expand_path('../Downloads/LOCATION.xlsx')) 

xlsx.each_row_streaming(offset: 1) do |row| 
    Location.find_or_create_by(ukprn: row[0]&.value, accomurl: row[1]&.value, instbeds: row[2]&.value, instlower: row[3]&.value, instupper: row[4]&.value, locid: row[5]&.value, name: row[6]&.value, lat: row[7]&.value, long: row[8]&.value, locukprn: row[9]&.value, loccountry: row[10]&.value, privatelower: row[11]&.value, privateupper: row[12]&.value, suurl: row[13]&.value) 
end

，我讀了在Ruby 2.3.0通過包括方法之前&它不包括零誤差的方法，所以我希望這會工作。

第4行似乎工作正常，但因爲它得到一排在下面空格是錯誤的片段，我得到：

Location Load (1.1ms) SELECT "locations".* FROM "locations" WHERE "locations"."ukprn" = $1 AND "locations"."accomurl" = $2 AND "locations"."instbeds" IS NULL AND "locations"."instlower" = $3 AND "locations"."instupper" = $4 AND "locations"."locid" = $5 AND "locations"."name" = $6 AND "locations"."lat" = $7 AND "locations"."long" IS NULL AND "locations"."locukprn" = $8 AND "locations"."loccountry" = $9 AND "locations"."privatelower" = $10 AND "locations"."privateupper" = $11 AND "locations"."suurl" = $12 LIMIT $13 [["ukprn", "10000055"], ["accomurl", "http://www.brookes.ac.uk/studying-at-brookes/accommodation/halls-in-detail/"], ["instlower", 4081], ["instupper", "4684"], ["locid", "6463"], ["name", "AB"], ["lat", "Abingdon &amp; Witney College (Abingdon Campus)"], ["locukprn", 51], ["loccountry", "-1.28696"], ["privatelower", 10000055], ["privateupper", "XF"], ["suurl", "4219"], ["LIMIT", 1]] 
ActiveRecord::StatementInvalid: PG::InvalidTextRepresentation: ERROR: invalid input syntax for type numeric: "Abingdon &amp; Witney College (Abingdon Campus)" 
: SELECT "locations".* FROM "locations" WHERE "locations"."ukprn" = $1 AND "locations"."accomurl" = $2 AND "locations"."instbeds" IS NULL AND "locations"."instlower" = $3 AND "locations"."instupper" = $4 AND "locations"."locid" = $5 AND "locations"."name" = $6 AND "locations"."lat" = $7 AND "locations"."long" IS NULL AND "locations"."locukprn" = $8 AND "locations"."loccountry" = $9 AND "locations"."privatelower" = $10 AND "locations"."privateupper" = $11 AND "locations"."suurl" = $12 LIMIT $13 
    from /home/dave/.rvm/gems/ruby-2.3.3/gems/activerecord-5.0.1/lib/active_record/connection_adapters/postgresql_adapter.rb:606:in `exec_prepared'

我認爲Postgres的不是內容與所述空數據被保存在數據庫中，因此「阿賓登&威特尼學院（阿賓登校區）」移動到另一列，因爲相關記錄，如下面的遷移記錄顯示的字符串：

class CreateLocations < ActiveRecord::Migration[5.0] 
    def change 
    create_table :locations do |t| 
     t.text :name 
     t.decimal :lat 
     t.decimal :long 
     t.string :locid, index: true 
     t.integer :locukprn 
     t.string :loccountry 
     t.integer :privatelower 
     t.string :privateupper 
     t.string :ukprn, index: true 
     t.string :suurl 
     t.string :accomurl 
     t.integer :instbeds 
     t.integer :instlower 
     t.string :instupper 
     t.references :institute, foreign_key: true, index: true 
    end 
    end 
end

難道這是怎麼回事錯了，在那裏有關如何解決這個問題的任何建議？

來源

2017-01-25 Dave C

'錯誤：無效的輸入語法類型的數字：「阿賓登&威特尼學院（阿賓登校區）」 '我可能會讀這個錯誤，但是，這個值不是數字嗎？ – whodini9

但架構中的數據既不是數據，也是「文本」，因爲它位於「名稱」列下。 –

您的選擇有：

[ 
(0)["ukprn", "10000055"], 
(1)["accomurl", "http://www.brookes.ac.uk/studying-at-brookes/accommodation/halls-in-detail/"], 
(2)["instlower", 4081], 
(3)["instupper", "4684"], 
(4)["locid", "6463"], 
(5)["name", "AB"], 
(6)["lat", "Abingdon &amp; Witney College (Abingdon Campus)"], 
(7)["locukprn", 51], 
(8)["loccountry", "-1.28696"], 
(9)["privatelower", 10000055], 
(10)["privateupper", "XF"], 
(11)["suurl", "4219"], 
(12)["LIMIT", 1] 
]

這經緯度值不是一個數字和遷移具有t.decimal :lat

來源

2017-01-25 19:55:47 whodini9

如上述評論所述，該條目在第6行，因此應該在'name'之下，根據遷移格式爲'text'。 –

它看起來像'find_or_create'從'row [7]'拉出'locations.lat'，因此'SELECT'確實''locations「。」lat「= $ 7'這個名字是在6的右邊？ – whodini9

是的，應該是。「Abingdon & Witney College（Abingdon Campus）」來自電子表格第6行，因此我不明白這個錯誤。 –

保存空白Excel單元格到Rails Postgres數據庫

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