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Null Pointer Exception #93

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akshaykumar12527 opened this issue Mar 9, 2016 · 2 comments
Open

Null Pointer Exception #93

akshaykumar12527 opened this issue Mar 9, 2016 · 2 comments
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@akshaykumar12527
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websites, _ := DB.NodesByLabel("Website")
for _, website := range websites {
stmt := MATCH (webpage:Webpage)-[]->(website:Website{website:{website}}) RETURN webpage;
address, _ := website.Property("address")
params := neoism.Props{"website": address}

    // query results
    res := []struct {
        Webpage neoism.Node `json:"webpage"`
    }{}

    // construct query
    cq := neoism.CypherQuery{
        Statement:  stmt,
        Parameters: params,
        Result:     &res,
    }
    // execute query
    err := DB.Cypher(&cq)
    fmt.Println(err, res[0].Webpage.Id())  
}

Here err is nil but res[0].Webpage is typeof Node and still have not Id() method and Data present in this object.
@jmcvetta jmcvetta added the bug label Mar 9, 2016
@jmcvetta
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jmcvetta commented Mar 9, 2016

Thanks for reporting this issue.

Unfortunately the info supplied in the issue is not sufficient to reproduce the bug, as it presumes that data is already present in the database.

Please write a failing test case for this bug so I can easily reproduce it. Then I will try to find time to look into it. If you are able to resolve the bug yourself, and Pull Request will be happily accepted.

@akshaykumar12527
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It turns out that you have to initialize the Db property of Webpage returned by CypherQuery in res struct manually before you can call methods like Id() which is present in neoism.Node. Of course, you can do that once you are aware it has to be done, but it feels very awkward. Is there a more intuitive way of handling this?

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@jmcvetta @akshaykumar12527