我正在尝试极大地简化大型JSON文件,而该过程的一部分是有条件地过滤掉某些对象。我有一系列条件要申请,但我什至无法获得一个条件才能正常工作。
我一直在使用jq文档,但是我不是专业开发人员,因此阅读它具有挑战性。我在另一个stackoverflow线程中找到了一个示例,所以我一直在尝试调整它。
我的源JSON文件很大,但干净且格式正确。它基本上是一组平面对象。对象中的一些键也是数组,但是无论如何我都会丢弃其中的大多数键。下面是一个示例,显示了第一个对象:
[
{
"object":"card",
"id":"86bf43b1-8d4e-4759-bb2d-0b2e03ba7012",
"oracle_id":"0004ebd0-dfd6-4276-b4a6-de0003e94237",
"multiverse_ids":[
15862
],
"mtgo_id":15870,
"mtgo_foil_id":15871,
"tcgplayer_id":3094,
"name":"Static Orb",
"lang":"en",
"released_at":"2001-04-11",
"uri":"https://api.scryfall.com/cards/86bf43b1-8d4e-4759-bb2d-0b2e03ba7012",
"scryfall_uri":"https://scryfall.com/card/7ed/319/static-orb?utm_source=api",
"layout":"normal",
"highres_image":true,
"mana_cost":"{3}",
"cmc":3.0,
"type_line":"Artifact",
"oracle_text":"As long as Static Orb is untapped, players can't untap more than two permanents during their untap steps.",
"colors":[
],
"color_identity":[
],
"legalities":{
"standard":"not_legal",
"future":"not_legal",
"historic":"not_legal",
"pioneer":"not_legal",
"modern":"not_legal",
"legacy":"legal",
"pauper":"not_legal",
"vintage":"legal",
"penny":"not_legal",
"commander":"legal",
"brawl":"not_legal",
"duel":"legal",
"oldschool":"not_legal"
},
"games":[
"paper",
"mtgo"
],
"reserved":false,
"foil":true,
"nonfoil":true,
"oversized":false,
"promo":false,
"reprint":true,
"variation":false,
"set":"7ed",
"set_name":"Seventh Edition",
"set_type":"core",
"collector_number":"319",
"digital":false,
"rarity":"rare",
"flavor_text":"The warriors fought against the paralyzing waves until even their thoughts froze in place.",
"card_back_id":"0aeebaf5-8c7d-4636-9e82-8c27447861f7",
"artist":"Terese Nielsen",
"artist_ids":[
"eb55171c-2342-45f4-a503-2d5a75baf752"
],
"illustration_id":"6f8b3b2c-252f-4f95-b621-712c82be38b5",
"border_color":"white",
"frame":"1997",
"full_art":false,
"textless":false,
"booster":true,
"story_spotlight":false,
"edhrec_rank":1836,
"prices":{
"usd":"17.07",
"usd_foil":"72.02",
"eur":"10.73",
"tix":"0.79"
},
"related_uris":{
"gatherer":"https://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=15862",
"tcgplayer_decks":"https://decks.tcgplayer.com/magic/deck/search?contains=Static+Orb\u0026page=1\u0026utm_campaign=affiliate\u0026utm_medium=api\u0026utm_source=scryfall",
"edhrec":"https://edhrec.com/route/?cc=Static+Orb",
"mtgtop8":"https://mtgtop8.com/search?MD_check=1\u0026SB_check=1\u0026cards=Static+Orb"
}
}
]
首先,我尝试添加一个条件,该条件将删除键“重印”值为true的对象。这是到目前为止我得到的:
curl -s https://archive.scryfall.com/bulk-data/default-cards/default-cards-20200529170427.json | jq .[] - "map(select(.reprint[] | contains (\"true\")))" > reprints_removed.json
但是我一直收到此错误:
jq: error: Could not open file map(select(.reprint[] | contains ("true"))): No such file or directory
一旦我开始工作,我想开始使用复合条件。因此,例如,接下来,我将删除键“ reprint”为“ true”或键“ border_color”为“ silver”的对象。
我要去哪里错了?
答案 0 :(得分:1)
顶级数组中每个对象中的.reprint值严格为布尔值,可以通过运行以下命令来查看:
jq 'map(.reprint)|unique'
因此,选择.reprint为false
的对象的有效方法是使用过滤器:
map(select(.reprint == false))
这将保留数组结构。如果只想将JSON对象作为流,则可以编写:
.[] | select(.reprint == false)
由于.reprint严格为布尔值,因此存在各种等效的条件公式。
如果.reprint是多值的,则要排除.reprint == true
的对象,可以使用否定符:
.[] | select(.reprint == true | not)
请注意,在jq中,not
是一个0元过滤器-它没有参数。
删除键“ reprint”为“ true”或键“ border_color”为“ silver”的对象。
map(select( (.reprint == true or .border_color == "silver") | not))