MongoDB: Cannot refer to field with a space -


i have mongodb collection ph_location, , 1 document in it:

> db.ph_location.findone({}) {     "_id" : objectid("579662fec773d83e625f71e8"),     "postal code" : 2800,     "town" : "bangued",     "province" : "abra",     "metro" : "" }

i having trouble referring field "postal code". find , update operations use field cannot locate it. instance:

> db.ph_location.findone({},{"postal code":1}) { "_id" : objectid("579662fec773d83e625f71e8") }

and

> db.ph_location.updatemany({}, {$rename:{"postal code":"zip_code"}}) { "acknowledged" : true, "matchedcount" : 2271, "modifiedcount" : 0 }

any ideas problem be?

i'll bet non-breaking space , not regular space.

try this:

db.ph_location.find({"postal\u00a0code" : 2800})

you can debug characters in keys using this:

function codepoints(str) {     var result = "";     (var = 0, len = str.length; < len; i++) {         result += "'" + str[i] + "':" + str.charcodeat(i) + ", ";     }     return result; } function walk(obj) {   (prop in obj) {     if (obj.hasownproperty(prop) && isnan(prop)) {       print(prop + " " + codepoints(prop));       walk(obj[prop]);     }   } } var cursor = db. ph_location.find() while ( cursor.hasnext() ) {     obj = cursor.next();     walk(obj); }

look spaces ' ' in output. see:

' ':32

if space, or

' ':160

if non- breaking space, or other code if other char.


Comments

Post a Comment

Popular posts from this blog

jOOQ update returning clause with Oracle -

according http://www.jooq.org/doc/3.8/manual/sql-building/sql-statements/update-statement/ jooq doesn't support returning clause in update statements databases except firebird , postgres. does know, still correct oracle jooq? according oracle's documentation, oracle db supports returning clase delete, insert, or update statements. incorrect manual you're right - manual wrong , should fixed: https://github.com/jooq/jooq/issues/5470 single row update returning jooq 3.8 added support single row update .. returning statements. internally, uses callablestatement , pl/sql block of form: begin update "my_table" set "my_table"."column" = 'xyz' "my_table"."id" = 1 returning "my_table"."id", "my_table"."column" ?, ?; ? := sql%rowcount; end; the relevant issue is: https://github.com/jooq/jooq/issues/5190 multi row update returning a...
Read more

java - Warning equals/hashCode on @Data annotation lombok with inheritance -

i have entity inherits other. on other hand, i'm using lombok project reduce boilerplate code, put @data annotation. annotation @data inheritance produces next warning: generating equals/hashcode implementation without call superclass, though class not extend java.lang.object. if intentional, add '@equalsandhashcode(callsuper=false)' type. is advisable add annotation @equalsandhashcode (callsuper = true) or @equalsandhashcode (callsuper = false) ? if not added, 1 callsuper=false or callsuper=true ? the default value false . 1 if don't specify , ignore warning. yes, recommended add @equalsandhashcode annotation on @data annotated classes extend else object. cannot tell if need true or false , depends on class hierarchy, , need examined on case-by-case basis. however, project or package, can configure in lombok.config call super methods if not direct subclass of object. lombok.equalsandhashcode.callsuper = call for configuration system ...
Read more

java - BasicPathUsageException: Cannot join to attribute of basic type -

i using java 8 jpa (hibernate 5.2.1). have clause works perfectly, until introduce clause make use foreign key table values too. i getting following error: basicpathusageexception: cannot join attribute of basic type i think problem related fact have join table, , not sure how create join using join table. employee - employee_category - category model (employee.java): @manytomany(cascade = cascadetype.all, fetch=fetchtype.eager) @jointable ( name="employee_category", joincolumns={ @joincolumn(name="emp_id", referencedcolumnname="id") }, inversejoincolumns={ @joincolumn(name="cat_id", referencedcolumnname="id") } ) private set<category> categories; model (category.java): @id private string id; jpa when introduce following code, fails error above (i think problem new piece of code): join<t, category> category = from.join("id"); predicates.add(criteriabuilder.like(category....
Read more