我正在尝试根据其值删除MongoDB嵌套数组中的元素...
下面是将数据加载到的插入查询
from math import floor, fabs
from PIL import Image, ImageSequence
def transform_image(original_img, crop_w, crop_h):
"""
Resizes and crops the image to the specified crop_w and crop_h if necessary.
Works with multi frame gif and webp images also.
args:
original_img is the image instance created by pillow ( Image.open(filepath) )
crop_w is the width in pixels for the image that will be resized and cropped
crop_h is the height in pixels for the image that will be resized and cropped
returns:
Instance of an Image or list of frames which they are instances of an Image individually
"""
img_w, img_h = (original_img.size[0], original_img.size[1])
n_frames = getattr(original_img, 'n_frames', 1)
def transform_frame(frame):
"""
Resizes and crops the individual frame in the image.
"""
# resize the image to the specified height if crop_w is null in the recipe
if crop_w is None:
if crop_h == img_h:
return frame
new_w = floor(img_w * crop_h / img_h)
new_h = crop_h
return frame.resize((new_w, new_h))
# return the original image if crop size is equal to img size
if crop_w == img_w and crop_h == img_h:
return frame
# first resize to get most visible area of the image and then crop
w_diff = fabs(crop_w - img_w)
h_diff = fabs(crop_h - img_h)
enlarge_image = True if crop_w > img_w or crop_h > img_h else False
shrink_image = True if crop_w < img_w or crop_h < img_h else False
if enlarge_image is True:
new_w = floor(crop_h * img_w / img_h) if h_diff > w_diff else crop_w
new_h = floor(crop_w * img_h / img_w) if h_diff < w_diff else crop_h
if shrink_image is True:
new_w = crop_w if h_diff > w_diff else floor(crop_h * img_w / img_h)
new_h = crop_h if h_diff < w_diff else floor(crop_w * img_h / img_w)
left = (new_w - crop_w) // 2
right = left + crop_w
top = (new_h - crop_h) // 2
bottom = top + crop_h
return frame.resize((new_w, new_h)).crop((left, top, right, bottom))
# single frame image
if n_frames == 1:
return transform_frame(original_img)
# in the case of a multiframe image
else:
frames = []
for frame in ImageSequence.Iterator(original_img):
frames.append( transform_frame(frame) )
return frames
现在，当它具有“ field”：“ Fix Version”时，我想删除“ items”数组中的元素。因此在Mongo --shell中尝试了以下查询。
db.records.insert({"key" : "ABC-111",
"listChgLogs" : [ {
"timestamp" : NumberLong("1543217249133"),
"user" : "kopi",
"changelog" : {
"id" : "744683",
"items" : [ {
"field" : "Fix Version",
"fieldtype" : "jira",
"fieldId" : "fixVersions",
"from" : "23555",
"to" : null,
"fromSting" : "Release 4.0.15",
"toSting" : null
},
{
"field" : "Fix Version",
"fieldtype" : "jira",
"fieldId" : "fixVersions",
"from" : null,
"to" : "23539",
"fromSting" : null,
"toSting" : "Release 4.0.14"
} ]
}
},
{
"timestamp" : NumberLong("1542830553816"),
"user" : "kaneshen",
"changelog" : {
"id" : "741833",
"items" : [ {
"field" : "status",
"fieldtype" : "jira",
"fieldId" : "status",
"from" : "13516",
"to" : "6",
"fromSting" : "Log Work",
"toSting" : "Closed"
} ]
}
},
{
"timestamp" : NumberLong("1542807125525"),
"user" : "kaneshen",
"changelog" : {
"id" : "741526",
"items" : [ { "field" : "status",
"fieldtype" : "jira",
"fieldId" : "status",
"from" : "10507",
"to" : "6",
"fromSting" : "In Review",
"toSting" : "Closed"
} ]
}
}
]
})
但是我得到了错误：
db.records.update({"key" : "ABC-111"},{$pull: {"listChgLogs.changelog.items.fields": "Fix Version"}})
db.records.update({"key" : "ABC-111"},{$pull: {"listChgLogs.changelog.items": {"fields": "Fix Version"}}})
类似地...
WriteResult({
"nMatched" : 0,
"nUpserted" : 0,
"nModified" : 0,
"writeError" : {
"code" : 28,
"errmsg" : "Cannot use the part (changelog) of (listChgLogs.changelog.items.fields) to traverse the element ({listChgLogs: [ { timestamp: 1543217249133, user: \"kopi\", changelog: { id: \"744683\", items: [ { field: \"Fix Version\", fieldtype: \"jira\", fieldId: \"fixVersions\", from: \"23555\", to: null, fromSting: \"Release 4.0.15\", toSting: null }, { field: \"Fix Version\", fieldtype: \"jira\", fieldId: \"fixVersions\", from: null, to: \"23539\", fromSting: null, toSting: \"Release 4.0.14\" } ] } }, { timestamp: 1542830553816, user: \"kaneshen\", changelog: { id: \"741833\", items: [ { field: \"status\", fieldtype: \"jira\", fieldId: \"status\", from: \"13516\", to: \"6\", fromSting: \"Log Work\", toSting: \"Closed\" } ] } }, { timestamp: 1542807125525, user: \"kaneshen\", changelog: { id: \"741526\", items: [ { field: \"status\", fieldtype: \"jira\", fieldId: \"status\", from: \"10507\", to: \"6\", fromSting: \"In Review\", toSting: \"Closed\" } ] } } ]})"
}
})
不确定我缺少什么...请帮助...