nested

问题 As much amazing info as is out there, it often seems to fall just short of my demented requirements. That said, I'm looking for a mechanism by which to handle multiple nested models on a single page. Now, I've seen all the videos and posts (not really, but humor me) on nesting two models (Railscasts, etc.). However, I need to deal with models nested 4 deep, all the while using Javascript to keep the page clean. Basically I have Site -> Buildings -> Controllers -> Measurements and would like

问题 I have the following models: class SearchCity(models.Model): city = models.CharField(max_length=200) class SearchNeighborhood(models.Model): city = models.ForeignKey(SearchCity, on_delete=models.CASCADE) neighborhood = models.CharField(max_length=200) and then the following nested serializer: class CityNeighborhoodReadOnlySerializer(serializers.ModelSerializer): searchneighborhood_set = serializers.PrimaryKeyRelatedField(many=True, read_only=True) class Meta: model = SearchCity fields = (

问题 I am trying to sort the order of a nested structure in descending order by a specified parameter. Please refer to the following nested structure: struct(1).otherStruct(1).name = 'A'; struct(1).otherStruct(1).classAve = 21; struct(1).otherStruct(2).name = 'B'; struct(1).otherStruct(2).classAve = 21; struct(1).otherStruct(3).name = 'C'; struct(1).otherStruct(3).classAve = 21; struct(2).otherStruct(1).name = 'D'; struct(2).otherStruct(1).classAve = 13; struct(2).otherStruct(2).name = 'E'; struct

问题 I am trying to target the element "worldwide_gross", add up these up for each movie belonging to each movie director, then return a hash with the name of movie director as a key and sum of "worldwide_gross" for all their movies as a value. result = Hash.new(0) i = 0 #which movie director's hash we're on while i < nds.length do j = 0 # which key in each director's hash while j < nds[i][:movies].length do total += nds[i][:movies][j][:worldwide_gross].to_i j += 1 end i += 1 result[name] = total

问题 I cannot figure out, how to make right solution, when I want to call action in my container from other component, by the way I want to use spread operator because I need to pass too many parametrs in my component and don't want describe all of them. I know I can pass all props from redux store via props, like this example in Menu, but my component too nested, and I have to send props in eighter component in nest render() { return ( <div className="wrapper"> <Menu {...this.props} /> </div> );

问题 In my instance of Solr 4.10.3 I would like to index JSONs with a nested structure. Example: { "id": "myDoc", "title": "myTitle" "nestedDoc": { "name": "test name" "nestedAttribute": { "attr1": "attr1Val" } } } I am able to store it correctly through the admin interface: /solr/#/mySchema/documents and I'm also able to search and retrieve the document. The problem I'm facing is that when I get the response document from my Solr search, I cannot see the nested attributes. I only see: { "id":

问题 I often use nested dictionaries in Python 2.7 with 3 or more tiers and use a nested for loop structure, as shown below, to access each element. does anyone know of a simpler, neater or faster method to do so? for foo in mydict: for bar in mydict[foo]: for etc in mydict[foo][bar]: mydict[foo][bar][etc] = "value" 回答1: You're using keys to access values. How about using dict.itervalues() instead? for foo in mydict.itervalues(): for bar in foo.itervalues(): for etc in bar: # Iterating a

问题 I have two sets of incomplete types (i.e. struct names, missing generic parameters and lifetimes), and I need to have some code executed for each possible pair of combinations: // these are my types struct A<T> { ... } struct B<'a, 'b, T> { ... } struct C { ... } struct X<T> { ... } struct Y { ... } struct W<'a> { ... } struct Z<T, D> { ... } // this is the code I need to generate match (first_key, second_key) { ("a", "x") => { ... A ... X ... } ("a", "y") => { ... A ... Y ... } ("a", "w") =>

问题 I have a query that worked in our Firebird SQL data module. We migrated to MySQL and all my queries work no problem except for this one. Please help me fix this. I get an error: Failed to Execute. Unknown column 'part.id' in 'on clause' My Firebird query: SELECT vendor.name AS "Vendor Name", Cast(Cast(vendorparts.lastdate AS date) AS CHAR(10)) AS "Last Date", CASE product.price WHEN '0' THEN 'CONFIRM' WHEN NULL THEN 'CONFIRM' ELSE Round(product.price, 2) end AS "D-Price", Cast(vendorparts

问题 I'm using a game engine that cannot serialize nested lists such as List<List<int>> . What I need is a quick solution that will store multiple lists into one list. I am about to write this on my own but am wondering if any solutions already exist. Are there any wrappers out there that can store 'virtual' nested lists into one big list while providing the functionality you would expect from separate lists? 回答1: You can use Enumerable.SelectMany to flatten nested lists: List<int> flattened =